158 PROCEEDINGS OF THE [VOL. 34, No. 2 lobed margins, and in the structure of vesicula KEY TO THE SPECIES OF Macrolecithus seminalis. The new form closely resembles HASEGAWA ET OZAKI, 1926 M. gotoi in the position of genital pore but 1. Genital pore intercecal 2 differs from it in having a long tubular esoph- Genital pore extracecal M. elongatus agus. Park (1939) distinguished M. phoxinusi 2. Esophagus long and testes separated by from M. elongatus from the same host, Phox- uterine coils M. indiciis n. sp. inus logowskii, by the character of eggs. In Esophagus short and testes not sep- M. elongatus the uterus is pretesticular and arated by uterine coils M. gotoi the eggs are 78 to 81 by 36 to 43 p with thick LITERATURE CITED shells; in M. phoxinusi the uterus reaches the posterior edge of the posterior testis and the HASEGAWA, K., AND OZAKI, Y. 1926. A new eggs are 70 to 84 by 45 to 48 ^ with thin trematode from Misgnrnus anguillicaudatus. Zool. Mag. 38: 225-228. shells. In the opinion of authors the extension PARK, J. T. 1939. Trematodes of fishes from of uterus is a variable character as the posterior Tyosen. III. Some new trematodes of the extent of the uterus in M. indiciis showed equal family Allocreadiidae Stossich, 1904 and the variation and the relative size of eggs is a genus Macrolecithus Hasegawa and Ozaki, minor character and has no importance. Ac- 1926. Keizyo. Jour. Med. 10: 52-62. YAMAGUTI, S. 1958. Systema Helminthum. In- cordingly M. phoxinusi is considered a syn- terscience Publishers, New York, London. onvm of M. elongatus. Vols. I and II: 1-1575. Studies on the Genus Alaimus de Man, 1880, with Description of Six New Species from India MOHAMMAD RAFIQ SIDDIQI AND ZAHID HUSAIN' The genus Alaimus de Man, 1880, belongs, (de Man, 1876) Pearse, 1942. Goodey, in the besides the related genus Amphidelus Thorne, same publication, proposed and recognized 1939, in the family Alaimidae Micoletzky, Alaimoidea in place of Alaimidae. In our view, 1922. Thorne (1939) considered this family Diphtherophoroidea does not belong to Alai- under Dorylaimoidea. Chitwoocl and Chit- mina but to Dorylaimina where Belonenchidae wood (1937) regarded it as a member of and Basirotvleptidae have members with some- Enoplida. Clark (1961) proposed a new sub- what similar buccal armature and occasionally order, Alaimina, under Enoplida in view of an excretory pore is found in members of the presence of seven esophageal glands and Leptonchidae. on the reported opening of the dorsal esoph- ageal gland anterior to the nerve ring (Chit- THE GENUS Alaimus DE MAN, 1880 wood, 1937) which obviously is not true. Therefore, Clark (1962) modified the concept DIAGNOSIS: Alaimidae: Lip region rounded of Alaimina. However, this time, Clark brought to conical; outer circlet of papillae easily seen, the superfamily Diphtherophoroidea (Mico- inner obscure. Excretory pore variable in posi- letzky, 1922) Clark, 1961, under Alaimina. tion on neck but usually near head end. Am- This opinion was concurred by Goodey (1963) phidial aperture a minute pore, amphid pouch who referred the suborder to Dorylaimida lacking, sensillae close to amphidial apertures. Stoma appearing conical, triradiate. Esoph- 1 Department of Zoolosy, Aligarh Muslim University, agus enlarging in posterior third or less. Aligarh, U.P., India. M.R.S. now at C.B.H., St. Albans, Esophageal glands reported as seven but usu- England. Copyright © 2011, The Helminthological Society of Washington JULY, 1967] HELMINTHOLOGICAL SOCIETY 159 ally three seen. Esophago-intestinal valve Length of tail less than 8 times anal small, discoidal, or conoid. Prerectum absent. body width 19 Vulva transverse, usually pre-equatorial, with 15. Length of tail more than 10 times anal thick labia. Ovary single except in A. macer body width 16 Andrassy, 1958. Ventro-median series of sup- Length of tail less than 10 times anal plements present. body width 18 TYPE SPECIES: Alaimus primitivus de Man, 16. Lip region abruptly narrowed 17 1880. Lip region not abruptly narrowed meyli Andrassy, 1961 KEY TO SPECIES OF Alaimm 17. Lip region broadly truncated ( BASED ON FEMALES) leptus n. sp. 1. Ovary single .. -2 Lip region narrow, not truncated ._ Ovaries paired .... macer Andrassy, 1958 10 , _----- thrixus n. sp. 2. Body length 4 mm 18' Tai1 hooked> terminus rounded '.:.. elongatus de Man, 1906 medius n. sp. Body length under 3 mm 3 Tail not hooked' terminus pointed ...... 3. Postrectal intestinal sac present , „, -— j— Varmis Thome' 1939 thamugadi Maupas, 1900 19' Tai end Poin*ed 20 Postrectal intestinal sac absent 4 , Jail end rounded .. arcuatus Thome, 1939 4. Body length about 1 mm or more ....... 5 2()' Cuticle with Prominent longitudinal Body length about 0.8 mm or less ...... 12 stnae ***** Loof, 1964 5. Esophagus enlarging just behind nerve ,„ ^cle without longitudinal striae ...... 21 ring glissus Thome, 1939 2L ™ J?*?*?™ abruPUy narrowed; L = Esophagus enlarging more posterior .. 6 0.52-0.62 editorus n. sp. 6. Tail over 7 times anal body width ...... 7 Tai1 terminus not abruptly narrowed; Tail under 7 times anal body width .... 10 L = °-8 acutus Thome, 1939 7. Body length 2 mm; a = 90 SPECIES INQUIRENDAE: (1) Alaimus fili- simplex Cobb, 1914 formis Daday? 1894- (2) A. modestus Schuur- Body length less than 2 mm; a = less mans-Stekhoven and Teunissen, 1938. (3) A. n *, n7°i."""i 8 midtipapilhitus Wu and Hoeppli, 1929. (4) 8. Tail end abruptly conoid hamuius n. sp. , .„ , /r^ , 10nr>\ i j. i in-m _ ., j . i .-, -j n A. papillatiis (Dadav, 1899) Micoletzkv, 1922. Tail end not abruptly conoid 9 9. Excretory pore 3 head widths or less Alaimus jaulasali n. sp.~ from anterior end jaulasali n. sp. (Fig. 1, A-P) Excretory pore more than 5 head ^ • ,,,-,, widths from anterior end MEASUREMENTS: Eight females (paratypes): primitivus de Man, 1880 £ = ^^J^' a = 55-6°; b = 4'8-5'3; C = 10. V = 36; esophagus % as wide as body 7'° ,6; V ~ 41~44- at nerve ring ......... similis Thorne, 1939 Male (paratype): L = 1.06 mm; a = 70; V = 42-43; esophagus not so slender b - 4-5' c - 11; T = 46. at nerve ring 11 Female (holotype): L = 1.15 mm; a = 60; 11. Body length 2.5 mm; C = 24 b = 4-9'> c = 8^ V = 43"14- tenuis Thorne, 1939 DESCRIPTION: Female: Body elongate-cy- Body length 1.3 mm; C — 17 lindrical, regularly tapering towards both ends, nroximus Thorne 1939 assuming a "C" form when relaxed in hot 12. Vurva"almost"equatorial .. ' '.._ 13 water; tail occasionally becoming considerably Vulva pre-equatorial 14 veif^y *rcuate- Cutlcle sf°°th, with exceed- -,nr~., j j mgly fine transverse striae. Lip region rounded, 13. Tail end pegged fo/. .., , , , • ^ V 0 , AUl mm continuous with body contour, approximately mucronatus Altherr, 1950 } -i Tail end not pegged .... minor Cobb, 1893 , , , , ,. ., , 0 . T - Type specimens of all the new species reported here 14. Length of tail more than 8 times anal have been deposited in the Zoology Museum of the Aligarh K^>/-l,r T,7,'rl4-l-> I c; Muslim University and Rothamsted Exp. Sta., Harpenden, DOCly Wiatn ID England. Copyright © 2011, The Helminthological Society of Washington 160 PROCEEDINGS OF THE [VOL. 34, No. 2 Figure 1. A-P. Alaimus jaulasali n. sp. A. Head end of female, lateral. B. Head end of female, ventral. C. Female (holotype). D. En face view. E. Cross section through stoma. F. Cross section through base of lip region. G. Male. II. Head end of male. I. Nerve ring and hemizonid. J. Basal region of esophagus. K. Anterior end of male. L. Female tail. M. Vulva, lateral. N. Spicular region. O. Vulva, ventral. P. Tail end of male. Copyright © 2011, The Helminthological Society of Washington JULY, 1967] HELMINTHOLOGICAL SOCIETY 161 Figure 2, A-G. Alaimus thrixus n. sp. A. Anterior end of male. B. Esophageal base of female. C. Head end of female. D. Male. E. Female. F. Tail end of male. G. Tail end of female. Copyright © 2011, The Helminthological Society of Washington 162 PROCEEDINGS OF THE [VOL. 34, No. 2 % as wide at outer papillae as body at neck Alaimus thrixus n. sp. base. Tail elongate, regularly tapering to a (Fig. 2,A-G) pointed terminus, 11—12 times anal body width MEASUREMENTS: Three females (paratypes): long. Amphids porelike, about 85 p, from an- L = 0.71-0.72 mm; a = 53-58; b = 4.6-4.2; terior end; sensillae about 25 p. anterior to c = 6.2-6.6; V = 40-41. nerve ring. Mouth a small circular aperture, Two males (paratypes): L = 0.70-0.76 leading to a short, triradiate stoma behind mm; a = 60-67; b = 4.0-4.1; c = 6.6-7.6; T = which esophageal lumen appearing to be col- 50-51. lapsed in a hexaracliate pattern (Figs. 1, D—F). Female (holotype): L = 0.72 mm; a = 58; Excretory pore 16-19 ^ or 2 Mi to 3 head b = 4.1; c = 6.4; V = 40 1T. widths from anterior end of body. Esophagus DESCRIPTION: Female: Body ventrally arcu- slender, 77 body width at nerve ring, expanding ate, regularly tapering at both ends (Fig. 2, in its last fifth. Esophagus-vulva distance 20- E). Lip region elevated, conoid-rounded, 45 p, longer than the length of esophagus. abruptly narrowing anteriorly from level of Nerve ring prominent, at about midesophagus, outer labial papillae. Cuticle marked by very- prominent ventral offshoot of nerve ring form- fine transverse striae. Esophagus Mi as wide as body near nerve ring, gradually enlarging ing a hemizonid a little posteriorly (Fig. 1, in its basal % to become three body widths I). Esophago-intestinal valve small, broadly long.