M E M OI R S OF THE CA RN E GI E MU SE U M . l Vo . VI No . 5 . T G THE H THE CA ALO OF FOSSIL FIS ES IN CARNEGIE MUSEUM . T T T THE T PAR II . SUPPLEMEN O CA ALOG OF FISHES FROM THE R T UPPE EOCENE OF MON E BOLCA . BY . C . R EASTMAN . — (Plates XLIII XLVIIA) . When of 1 1 , in the spring the year 9 0, a systematic investigation of the fossil fishes in the Carnegie Museum was undertaken by the present writer on the in i i i l t at ve of . H the Director , Dr W J o land, attention was first directed to the e r markably fine series of specimens from the Upper Eocene of Monte Bolca, near u Verona, in northern Italy . What was then s pposed to be the entire suite of ’ to material belonging the Museum passed through the writer s hands , for the f r o xh . T s pu pose being identified, labeled , cataloged, and in part e ibited hi done , n l f f an accou t of the co lection o Bolca fishes , illustrated by a number o plates , was 1 published in the Fourth Volume of the Memoirs of the Carnegie Museum . Subsequently it was fortunately discovered that the paleichthyological f The s resources o the Museum were greater than had been supposed . di covery s r e- of aleonto was made by Mr . O . A . Peter on , who in arranging a large quantity p ” logical material in storage , came across a case of fossils marked Bayet Collection . Thi s box was found to contain a number of unusually well preserved specimens of f ur l fishes from Monte Bolca , some o them having already serve d the p pose of il us tr tin a g the Veronese fauna in an earlier publication , and therefore ranking as 2 h ot fi ffi u yp yp es . It can be con dently a rmed witho t exaggeration that in point “ 1 M Eo of a a o of ssi is in a us um a 1 . is s m C t l g Fo l F hes the C rnegie e , P rt F he fro the Upper cene ” M m i i M m l 1 M Bo a. o s Ca us u Vo . I 191 No . 7 . onte lc e r rneg e e , V, , 2 ‘ T r su ori i a x m a s am Am histium a adoxum E hi us r hombeus and Rhombus h ee ch g n l e e pl r , n ely, p p r , p pp , M l n in hi M m i i imen Pkoto r a hicumAnimalium i mus fi ur A . B mi n d b . assa o o s o d S e , were g e y g e r ent tle p c g p ’ m ssil A 1 . uor und am Plantar u ue Fo zum i Ver onensi s etc . o a 859 q q gr , , Ver n , 3 15 316 MEMOIRS OF THE CARNEGIE MUSEUM . s h ot es u as . 5305 of excellence of , pre ervation , one of these yp yp , that catalog ed No , is unsurpassed by any fossil fish from this locality which has thus far been brought Th s su o f f ss to light . e following page are pplementary to Part I the Catalog o Fo il Fishes from Monte Bolca in the Carnegie Museum . Subclass ELASMOBRANCHII . T Y I Family R GON DzE . Tr . 1 . ygon muricata (Volta) (Plate XLIII) . ' i Itt oli . B r n fi 1 mum a ta . o 796 . Ra a c G t e ese . 37 . s . 1 2 . j S Volta , , p , pl ix , g , ’ 1 1 T i ul ar i H D . u D Hi 8 8 . r onobat s v s . No v . d st . xx n yg g de Blainville , ict Nat , v , 6 . p . 33 1 hr 2 835 . Tr on azz olw . ss u a b . 47 . yg g L Aga iz , Ne es J , p 1 l Tr on azz ol P i . s o . 2 . 84 . V 3 oe . o ss 38 yg g L Agassiz , Fos , III , p 1 2 . Ale a r i z r 8 x n i . 6 d num s . R t un sbe . s . p Molin , S g Akad Wis Wien , Vol . XLII , p . 579 . 1 4 ' 87 . Alexandrinum olimi Zi . I i m . n 2 o R . st t . 89 A de g , Mem Veneto , Vol XVIII , p , PI. XII . 1 Tr l . Zi n l 874 . on azz o 1 w o . c . 80 yg g A de g , , p ' 1894 . Tr on Toemur r i k l i a mu cata . ae e D e eocanen om M yg ( ) O J , Selachier v onte ” 142 . fi . 2 3 . Bolca, p , pl iv, g . 1 4 r 90 . T on mur i catu s . R . s u . Mu . Z . 23 . yg C Ea tman , B ll s Comp ool , Vol XLVI , p . 1 Tr on mur i' a u 905 . t R . s . c s . G . o . 4 yg C Ea tman , Mem Soc eol France , Vol XIII , N 3 , p . 8 . Tr on muri c t 191 1 . M a a . R . l o . 2 . s o . 7 yg C Eastman , Mem Carnegie u , V IV, N , p 35 — T e. u u u H yp Nearly complete skeleton ; Paris M se m of Nat ral istory . Tw o well-preserved examples of this species are figured by Jaek el in his mono on s graph Eocene Selachian from Monte Bolca, one of which had previously been ' us - l made the typ e of a separate gen and species , the so cal ed Alexandr inum molim Zi ’ . Th l of Baron A de gno . e second of J aek e s originals was erroneously stated by u b s i 1 that a thor to have een the identical pecimen which is shown n Plate IX, Fig . , ’ ’ f - . o of Volta s work In point fact , however , Volta s type specimens are preserved s us um t H s u in the Pari M e of Na ural i tory, and were there st died by the present writer some ten years ago . The sole character bywhich the genus Alexandr inum is said to be distinguished : or EASTMAN FISHES FROM UPPER EO CENE MONTE BOLCA . 317 Tr on s to s u s from yg relate the more di tal position of the ca dal pine , which arises di b u u u i at a stance behind the pelvic arch a o t eq al to the maxim m w dth of the disc . Jaek el in his memoir above referred to rightly holds that this does not constitute f for a valid di ferential character , examination of a number of specimens shows that s u the relative position of the caudal ting is abo t the same in all . Tw o examples of this Eocene ray are contained in the Bayet Collection of the u u s u Carnegie M se m , one small and pre erved in co nterpart , the other a beautiful specimen , larger than the type , and Showing many structural details in great per f i n T t o . h m 4 2 ec e u No . 5 1 small, evidently i mat re individual , is cataloged as 452 1a 4 4 . An us + , and the larger adult specimen bears the Catalog No . 30 ill tr ation of l the the latter is Shown in P ate XLIII . In this various cartilages of the u head, especially those abo t the mouth and scapular arch, and of those forming the b of l of axes of the pectoral fins , are clearly visible , and a num er sma l teeth, the Tr on- - characteristic yg typ e , are also seen to be attached to the palato quadrate - f cartilage . An impression is preserved of the body walls o the trunk on either side “ of The the vertebral columns as far as the point of insertion of the caudal spine . s s u s of latter displays a median dor al groove , bear a do ble serie strong posterior has u denticles , and a total length of abo t 9 cm . u s T T S bcla s ELEOS EI . Order SOLENICHTHYES . T . en r i coi nl T D r . R C t s ds his ordinal term , first proposed by . C egan for the o y , and afterwards (in 1909) extended so far asto include the Aulostomids and Lopho - u branchs , marks the present day conception of the evol tionary history of that h b group of physoclistous fishes with abdominal ventrals , of w ich the stickle acks - - form the well kn own ground type . The Gaster osteids and their immediate allies were first united by Cope in 1887 f H of sub under the comprehensive designation o emibranchii , and the limits this in 190 1 u Lo ho order were enlarged by A . Smith Woodward to incl de also the p u Kner Steindachner 1863 branchs of Cuvier , purs ant to the view of and ( ) that these ll s s are only extremely specialized sticklebacks w ith tufted gi s . For thi same as oci ation of Lophobranchs and Hemibr anchs the new name of Thoracostei w as proposed n 1 2 of Pthinobr anchii w as s .