

. 



ICHTHYOLOGY. 



7 



cheeks "beneath the eye. The pectoral fins are sub-lanceolated ; their extremities extending 

 beyond the tips of ventrals and the anterior margin of the anal fin. The ventrals themselves 

 overlap the vent and reach the origin of the anal. The origin of the dorsal fin is opposite the 



* 



base of the pectorals, and, consequently, situated in advance of the insertion of the ventrals. 

 The scales are large and finely serrated upon their posterior margin. The radiating furrows of 

 the anterior section are quite numerous. The posterior margin of the caudal is more deeply 

 emarginated than in P. speciosus. 



Br. VI: V; D X, 12 ; A III, 11; C 3, 1, 8, 7, 1, 2 ; V I, 5 ; P 13. 



The scales are large and finely pectinated upon their posterior margin. They appear 

 proportionally deeper than in P. speciosus. Small and polymorphic scales may he traced along 

 the base of the caudal fin and soft portion of the dorsal and anal, as is the case also in P. 

 speciosus and most species of the genus. 



The color is reddish brown, sometimes blackish brown. The auricular flap is provided with 

 a light postero-inferior margin. The tint upon the sides of the head is uniform with that of 

 the sides of the body. The dorsal is provided posteriorly with a dark patch or blotch. A black 

 patch may occasionally be observed at the posterior margin of the anal fin also. The young 

 are unicolor. 



Plate II, fig. 1, represents Pomotis heros, size of life ; fig. 2 is a scale from the dorsal region ; 

 fig. 3, a scale from the lateral line ; and, fig. 4, a scale from the abdominal region. 



List of specimens. 





Catal. 

 No. 



438 

 440 

 441 

 442 

 443 



No. of 

 spec. 



4 



1 



7 



12 



Age 



Adult. 



8 Younor 



do 



do 



do. . 



Locality. 



Rio Cibolo, Texas 



Dry creek, near Victoria, Texa 

 do 



do 



Rio San Juan and near Cade- 

 reita, N. L. 



When 

 collected. 





1851 

 1854 

 1854 

 1854 

 1852 



Whence obtained. 



Col. J. D. Graham. 



Maj. Emory 



do 



do 



D.N. Couch 



Orig. 

 No. 



Nature of 

 specimen. 



54 



56 



53 



15&19 



Alcoholic. 



• « • •GO • • • • 



do 



do 



Collected by 



Jno. II. Clark 



Dr. C. B. Kennerly 



do 



do 



, ...do.... D. N. Couch 



3. POMOTIS AQUILENSIS, B. & G. 



Plate III, Fn . 1—8. 



Spec. Char.— Body sub-elliptical in profile. Head moderate; snout bluntly sub-conical . Mouth moderate; posterior 

 extremity of maxillary extending to a line intersecting the anterior rim of the orbit. Eye moderate. Edge of preopercle 

 slightly denticulated or serrated. Auricular flap elongated and well developed . Spinous portion of dorsal fin elevated or else 

 of medium height. Anal spines well developed. Extremities of pectorals not extending as far back a» those of the ventral 

 which overlap the vent and reach the anterior margin of the anal fin. Reddish brown ; fins greyish olive, unicolor ; dorsal and 

 anal provided with a black patch . 



Syi 



Pomotis aquilensis, B. & G. in Proc. Acad. Nat. Sc. Philad. VI, 1853, 357 

 Pomotis nefastus, B. & G. in Proc. Acad. Nat. Sc. Philad. VII, 1854, 24. 





Resembles very much P. speciosus in general appearance, having sometimes, in common with 

 the latter, the spinous portion of its dorsal fin quite elevated, it being then higher, or equal at 

 the least, to the soft portion, which occupies the two-fifths of the base. Generally, however, it 

 is of but moderate height. The caudal fin, which constitutes about the fifth of the total length, 

 is more emarginated posteriorly than in P. speciosus. 



