Annals and Magazine of Natural History: Series 4 I
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This article was downloaded by: [University of Calgary] On: 04 February 2015, At: 12:41 Publisher: Taylor & Francis Informa Ltd Registered in England and Wales Registered Number: 1072954 Registered office: Mortimer House, 37-41 Mortimer Street, London W1T 3JH, UK Annals and Magazine of Natural History: Series 4 Publication details, including instructions for authors and subscription information: http://www.tandfonline.com/loi/tnah10 I.—Contributions to the study of the Entomostraca George Stewardson Brady C.M.Z.S. Published online: 16 Oct 2009. To cite this article: George Stewardson Brady C.M.Z.S. (1872) I.—Contributions to the study of the Entomostraca , Annals and Magazine of Natural History: Series 4, 10:55, 1-17, DOI: 10.1080/00222937208696629 To link to this article: http://dx.doi.org/10.1080/00222937208696629 PLEASE SCROLL DOWN FOR ARTICLE Taylor & Francis makes every effort to ensure the accuracy of all the information (the “Content”) contained in the publications on our platform. However, Taylor & Francis, our agents, and our licensors make no representations or warranties whatsoever as to the accuracy, completeness, or suitability for any purpose of the Content. Any opinions and views expressed in this publication are the opinions and views of the authors, and are not the views of or endorsed by Taylor & Francis. The accuracy of the Content should not be relied upon and should be independently verified with primary sources of information. Taylor and Francis shall not be liable for any losses, actions, claims, proceedings, demands, costs, expenses, damages, and other liabilities whatsoever or howsoever caused arising directly or indirectly in connection with, in relation to or arising out of the use of the Content. This article may be used for research, teaching, and private study purposes. Any substantial or systematic reproduction, redistribution, reselling, loan, sub-licensing, systematic supply, or distribution in any form to anyone is expressly forbidden. Terms & Conditions of access and use can be found at http://www.tandfonline.com/page/terms- and-conditions Downloaded by [University of Calgary] at 12:41 04 February 2015 THE ANNALS A~D MAGAZINE OF NATURAL HISTORY. [FOURTH SERIES.] " .................. per litora spargite museum, Naiades, et circhm vi~reos considi~e fontes: Poltlce virg[neo teneros h~ carpite flores: l~loribus et picture, dive, replete canistrum. At vos, o Nymphm Craterides, i~e sub undas; Ite, recurvato variat~ corania trunco ¥ellite muscosis e rupibus, et mihi conchas Ferte, De~ pelagi, et pingui conchyli~ succ~" 1¢. Pavthen.il Giannettazll 1~cl. L No. 55. JULY 1872. I.--Contrlbut~ons to the Study of the Entomostraca. By GEORGE STEWARDSONBRADY, C.M.Z.S. &c. :No. VII. A List of the Non-parasitlc Marine Copelvoda of t]ze North-east Coast of England. [Plates II.-VI.] THE following list, though embracing all the species at pre- sent known to me as inhabiting the above-named district, must be taken only as an instalment of what an exhaustive survey would no doubt reveal. The examination of these little creatures is exceedingly tedious and laborious, the points of difference being often undistinguishable except with tolera- bly high microscopic powers. Thus a very small gathering~ if it contain any great variety of species~ will often occupy many hours in its examination. Downloaded by [University of Calgary] at 12:41 04 February 2015 By far the greater number of species here noted, or described by foreign authors, are free-swimming animals ; some have a special predilection for the fronds of Fuci~ and others for muddy localities or the bed of the sea ; but little is yet known of the ground-inhabiting forms~ and among them there remains doubtless a rich harvest for future collectors. Two of the species described in Baird's ~British Entomo- straca' it seems impossible to identify--Canthocamptus Stromig and C. minuticornis. The former name probably applies to some member of the genus Thalestris~ the latter~ pcrhaps~ Ann. & Mag. 2V. Hist. Scr. 4. Fol.x. 1 2 Mr. G. S. Brady o~ the Non~aragtic Marine Co2eToda to a Laophon~. Neither species is included in the following list. Faro. Galanid~, Dana. Subfam. GAr,~vi:v~, Dana. Genus CALANUS,Leach. (CetocMl~s~Roussel de Vauz~m%fide Boeck.) Galanus finmarcMcus (Gunner). Monoeulusfmmarchie~, Gunner, Act. Hafn. (1765), x. p. 175, fi 20-23. Cetochilus septentrional@~Good~r±Edinb. New PhiL Journ. xxxv. p. 339, pl. 6. figs. 1-11 ; Baixd, Nat Hist. Brit. Entom. (1860), p. 335, t. 30. figs. 1, a-g. Cetoehilus helgoland~, Clatub Die frei-leb. Copep. (1863), p. 171, t. 26. figs. 2-9. According to M. Boeck the species described first by Gunner as MonooulusfinmarcMcus is identical with the CetocMlus hel- yo~andicus of Claus, and not at all with the species called by Baird TemorafinmarcMca. Leach's genus Calanus, however, was constituted to receive Gunner's species, and is synony- mous with the more recent name CetocMl~s, applied by Roussel de Vauz~me to the same animal. Not having the opportunitjr of reference to the original memoirs of Gunner and Leach, I must accept as substantially correct M. Boeck's careful account of this synonymy. The generic name CetocMlus must there- fore give way to Calanus. The present species, C. finmarc]~cus, is generally distributed all round the British coast, being met with in equal abundance both between tide-marks and in the open sea. It is said to constitute an important part of the food of the whale. Genus CLAUSIA~ Boeck. ClauMa elongata, Boeck. Clauda elongata, Boeck, Oversi~t Norges Copep. (1864), p. 10. Calanus Cla~i, Brady, Nat. Hist. Trans. N. & D. (1865), vol. i. p. 33, pl. 1. figs. 1-11,13. Downloaded by [University of Calgary] at 12:41 04 February 2015 Often taken in abundance, by the surface-net, in the open sea and in tide-pools, all along our coast. Boeck's C. elongata is undoubtedly the same species as that described by myself (possibly a little later, though I am not perfectly sure as to the actual date of publication of Boeck's monograph) under the name Calanus Clausii. The differences between this and the genus Paracalanus, Boeck (Calanus, Claus), lie chiefly [u the one-jointed inner branch of the first foot, and in the very small or entirely wanting frith foot of the female. It is, I think~ opento doubt whether these ought to of the North-east Coast of England. 3 be considered of generic importance; but the separation having been made~ it seems best ~o adhere to it. Genus DIAS~ Lilljeborg. Dins longiremls, Lilljeborg. Abundant all round the British Islands~ both in the open sea and between tide-marks ; frequent also in brackish water. Genus TEMORA~ Baird. 1. Temora [ongicornis (Mtiller). ~TdOps longicornis,Miiller~ Entomostraca (1785), p. 115, t. 19. figs. 7-9. morafinmarcMca, Baird, Brit. Entom. (1850), p. 228, t. 28. figs. 1~ a-g; Claus, Die frei-lelb. Copep. p. 195, t. 34. figs. 1-11 ; Brady, Nat. Hist. Trans. N. & D. vol. i. p. 36, pl. 1. fig. 15~ and pl. 2. figs. 1-10. Temora longieornis, Boeek, loc. c/t. p. 15. .Diaptomus longicaudatus~ Lubbock. (Not Monoeulus fenmarchicus~ Gunner.) Common in the open sea ; and between tide-marks perhaps the most abundant of all British species. 2. Temora velox, Lilljeborg. In the autumn months, when the brackish pools of salt marshes have become thoroughly warmed by the sun~ this species occurs in such situations in immense profusion. I have only on one or two occasions met with a stray specimen amongst the weeds on the sea-shore. Genus ISIAS~ Boeck. Isias clavipes, Boeck. Idas clavipes~ Boeck~ loe. cir. p. 18. Superior antennae twenty-five-jointed~ about equal in length to the ccphalothorax ; joints short and broad at the bas% and gradually increasing in length to the nineteenth~ which is about four times as long as broad ; first fifteen joints of the male antennm bearing each a single club-shaped~ ciliated~ Downloaded by [University of Calgary] at 12:41 04 February 2015 auditory seta ; hinge-joint of the twenty-one-jointed right male antenna situated between the eighteenth and nineteenth joints ; eighteenth joint formed by the coalescence of the normal eighteenth and nineteenth ; nineteenth by the twentieth and twenty-first; twentieth by the twenty-second~ twenty-third, and twenty-fourth. Mouth-organs and swimming-feet as in Centropages typicus. Fifth pair of feet two-branched, in the female having the inner branch of one joint with two terminal setse, the outer branch of three broad laminar joints, the second of which is produced on the inner margin into a broad spinous 14 ,4 Mr. G. S. Brady on the Non-Tarasltic Marine ColaeTod~ process: in the maze the feet are somewhat similar, but the central joint is destitute of the spinous process~ and the ter- minal joint of the outer branch of one side is expanded into a very broad lamina, which is terminated by a broad ciliated seta. Abdomen of the female with four, of the male with five segments. L ength~ exclusive of tail-set,e, ~ of an inch. Hab. Bridllngton Bay; several specimens taken in the towlng-net by Mr. E. C. Davison. On weeds in Roundstone and C]ifden ]Bays, Ireland (O. 8. B.). The most distinguishing characters of this fine species are the auditory setm. with which the uuver antennm are on their basal portions thickly clothed, and't!he broadly laminar con- struct~on of the fifth pair of feet, more especially in the male sex. Genus CENTROPAGES, Kr~iyer. (Ivhthyophorba, Lilljeborg; Ca/a~ Dana; CatoF/a(?), Dana.) 1. Centropages ~yp£cus, KrSyer. c. ~,KrSyer (1849),Nat.Tidsskr. Anden R~ekke andet Bind, Side 288; Boeck (1864), Oversigt over de red Norges Kyster iagttagne COl~oder, /c~h;opTwr/~ ~ Claus (1863), Die frei-lebenden Copepoden, p.