PISCES. 



TELEOSTEI. 



TELEOCEPHALI. 

 C YPRINODONTIDjE. 



" Head and body covered with scales ; barbels, none. 

 Margin ol the upper jaw formed by the premaxillaries only. 

 Teeth in both jaws; upper and lower pharyngeals, with car- 

 diform teeth. Dorsal fin situated on the hinder half of the 



body." (GtJNTHER.) 



TRICOPHANES, Cope. 



U. S. Geolog. Surveyor the Terrs., 1872, p. 641. 



Having secured a very perfect specimen of this genus, we 

 are enabled to complete the definition of its generic charac- 

 ters. We give, then, Professor Cope's definition, with some 

 emendations and additions: Dorsal and anal fins short; 

 ventral fin sometimes beneath and sometimes in advance of 

 the dorsal. The premaxillary forms all of the superior ar- 

 cade of the mouth, which has a wide gape, opening back be- 

 hind the orbit. This bone has a row of long, slender, re- 

 curved, and subequal teeth implanted in it. The dentary is 

 stout, and has a few small teeth. The branchiostegal rays 

 are six in number, and are rather wide. The preoperculum 

 IS serrate. The operculum is ridged on top. The anterior 

 vertebrae are unmodified, and the centra are not elongate. A 

 strong acute spine supports the dorsal, and a similar one the 

 anal fin. There is a long post-clavicle, which may or may not 

 extend to the base of the ventral parallel with the femur. 

 The femur is long and furcate ; the external part straight and 



