200 PROCEEDINGS OF THE ACADEMY OP 



Notice upon new Genera and new Species of Karine and Fresh- water Fishes from 

 Western North America. 



BY CHARLES GIRARD, M. D. 



I. PERCOIDS AND CATAPHRACTI. 



1. PoMoxis NITID0S. — Posterior extremity of maxillary bone corresponding to 

 a line intersecting the pupil. Insertion of ventrals situated opposite the inferior 

 edge of the base of the pectorals. Anterior spiny ray of anal fin under the 

 fourth dorsal one. Posterior margin of caudal fin subconcave. Upper regions 

 reddish, spotted and fasciated with brown ; inferior regions silver and golden 



Collected in Houston River, Ky., by E. L. Berthoud, Esq. 



2. Calmurus melanops. — Mouth very large ; gape directed obliquely upwards. 

 Posterior extremity of maxillary extending to a vertical line drawn posteriorly 

 to the orbit. Bye large. Insertion of ventrals situated opposite the base of^he 

 pectorals, a little in advance of the origin of the dorsal ; their tips not extend- 

 ing to the vent. Scales very large. Ground color reddish brown, with a 

 blackish spot upon the centre of each scale. A black patch at the upper and 

 posterior margin of the opercle. Soft portion of dorsal and anal fins spotted upon 

 their base. 



Inhabits the fresh waters of Texas. 



3. Calliurds diaphanus. — Mouth large ; gape oblique upwards. Posterior 

 extremity of maxillary extending to a vertical line drawn in advance of the 

 pupil. Eye large. Insertion of ventrals situated posteriorly to the base of 

 pectorals, and the origin of the dorsal ; their tips overlapping the vent. Scales 

 large. Greyish olive above ; yellowish or whitish beneath. Soft portion of 

 dorsal and anal fins provided with a black spot. 



Caught in the Rio Blanco, Texas. 



4. Calliurus FORMOsns. — Mouth large; gape oblique upwards. Posterior 

 extremity of maxillary extending to a vertical line passing beyond the middle 

 of the pupil. Eye moderate. Insertion of ventrals situated under the base of 

 of pectorals and a little posteriorly to the anterior margin of the dorsal ; their 

 tips reaching the vent. Scales moderate. Reddish-brown above, spotted with 

 black ; greyish beneath. Soft portion of dorsal and anal fins provided with a 

 black patch. 



Inhabits the fresh waters of Arkansas, chiefly. 



5. Callitjrus microps. — Mouth moderate, gape oblique upwards. Posterior 

 extremity of maxillary extending to a vertical line drawn midway between the 

 anterior rim of the orbit and the pupil. Eye small. Insertion of ventrals situ- 

 ated posteriorly to the base of the pectorals and tbe origin of the dorsal ; their 

 tips not reaching the vent. Scales moderate. Reddish-brown above with 

 centre of scales lighter ; greyish beneath. Soft portion of dorsal provided with 

 a black patch. 



Collected in the Rio Brazos, Texas. 



6. Calliurus murinus. — Mouth moderate, gape oblique upwards. Posterior 

 extremity of maxillary extending to a vertical line drawn inwardly to the ante- 

 rior rim of the orbit. Eye moderate. Insertion of ventrals situated posteriorly 

 to the base of the pectorals and opposite the origin of the dorsal ; their tips 

 reaching the vent. Scales large. Dark blackish brown. Soft portion of dorsal 

 fin provided with a black patch. 



From Texas. 



7. Brvttus albulus. — Body subelliptical, rather contracted and deep. Nape 

 convex, and snout subconical. Posterior extremity of maxillary extending to 

 a vertical line drawn anteriorly to the orbit. Insertion of ventrals situated pos- 



[November, 



