252 Bulletin 47, United States National Museum. 



character independently developed. (/co^Aoc, shell; yvdOog, jaws; the 

 covering of the jaw being hard, like shell.) 



. Scales moderate, about 40 in the lateral line. OHNATA, 396. 



aa. Scales large, about 34 in lateral line. BIGUTTATA, 397. 



396. COCHLOGNATHUS CRN ATA, Baird & Girard. 



Head 4; depth 4. D. 8; A. 6; lateral line 40; teeth 4-4. Appear- 

 ance, dorsal fin, and coloration much as in Pimepliales notatus or Cliola 

 vigilax. Body moderately elongate. Head rather long. Dorsal fin over 

 the ventrals, rather high ; anal fin quite small ; caudal fin short. Dorsal 

 fin with a black spot near the base in front and a dusky blotch behind ; 

 caudal fin with a dusky median band, in front and behind which is a 

 pale area; a dusky lateral band. Snout tuberculate in spring males, as 

 in Pimephales. Length 3 inches. Rio Grande. A singular little fish, 

 with the mouth resembling that of Chondrostoma or Acrocheilus, but the 

 structure otherwise different from either, (ornatus, adorned.) 



Cochlognathus ornatus, BAIRD & GIRARD, Proc. Ac. Nat. Sci. Phila., 1854, 158, Brownsville, 

 Texas; GUNTHER, Cat., vn, 187, 1868; JORDAN & GILBERT, Synopsis, 161, 1883. 



397. COCHLOGNATHUS BIGUTTATA, Cope. 



Head 5 in length, with the caudal fin ; depth a little less. Eye large, 

 3| in head, a little less than muzzle and than interorbital space. D. 8; 

 A. 7; scales 7-34-? Form of Pimephales notatus. Head oblong and 

 rather wide above. Muzzle decurved in profile; mouth terminal. Head 

 wide behind and flat above. Maxillary not quite reaching line of orbit. 

 Ventral fins inserted opposite second or third dorsal ray, reaching to 

 vent; anal fin small. Pectorals reaching three-fifths tp ventrals. Color 

 silvery, without dark markings, except a black spot afe the base of the 

 caudal and on the anterior rays of the dorsal. Length 2-J- inches. 

 Trinity River, Texas. Very close to the preceding, from which it may 

 perhaps differ in the larger scales. (Cope.) (biguttatus, two-spotted.) 



Cochlognathus biguUata, COPE, Bull. U. S. Nat. Mus., xvn, 1880, 37, Trinity River, Fort 

 Worth, Texas. (Coll. Cope.) JORDAN & GILBERT, Synopsis, 161, 1883. 



122. CLIOLA, Girard. 



Ceratichlhys,* BAIRD & GIRARD, Proc. Ac. Nat. Sci. Phila., 1853, 390; (name only ; no definition; 



applied to vigilax, which was not intended as type). 

 Cliola, GIRARD, Proc. Ac. Nat. Sci. Phila., 1856, 192, (mgilax). 

 Hypargyrus, FORBES, Proc. U. S. Nat. Mus., 1884, 200, (tuditamis). 



Form and appearance of Pimephales, the same squamation. fin rays and 

 plan of coloration, and the first ray of the dorsal similarly separated by 

 membrane, the structure of the mouth similar, but with the intestinal 

 canal short, shorter than body, the peritoneum pale and the teeth more 

 hooked, as in Rotropis. The single species bears a striking resemblance to 

 Pimephales notatus, but is distinguishable by the more contrasted coloration 

 and by the generic characters which ally it, with Cochlognathus, to the 

 carnivorous species called Notropis. The genus is certainly very near 

 Pimephales although in its technical characters it approaches nearer to 

 Xotropis. (A coined name, without meaning, first applied to a railway 

 station in Illinois.) 



* We do not use the name Ceraiichthys for this genus, because no explanation of its use was 

 given in the paper when it first appeared. It was at that time a MS. name of Professor Baird 

 for the group typified by Hybopsis Jcentuckiensis, and to this group C. vigilax was wrongly referred. 



