642 GEOLOGICAL SURVEY OF THE TERRITOEIES. 



is not seen in any genus. The bristle-like bodies are scattered over 

 the whole extent of the fish, esceptiug the head and the fins, and are 

 arranged in little aggregations, which are irregularly disposed. The 

 processes tliemselves lie irregularly together, as though :^^ee from each 

 other, and are evidently not the impressions of keels of the scales. 

 Traces of other scales are not visible, and the bodies described would 

 suggest the existenqe of an ossified ctenoid fringe on a less fully calsi- 

 fied scale, or possibly v/ithout such basis. 



Tkichophanes hians. Cope. 



Loc. cit, 480. 



Yertebrss, D., 9 -, C, 15 ; s^ between iuterneural spine of dorsal and 

 iaterhasmal of anal fiu. Radii, D. II, (?) 6, (soft rays somewhat injured ;) 

 A. II, 7 ; V. and P. not all preserved ; caudal rays numerous, forming a. 

 deeply bifurcate fiu. The ventrals reach a little over half way to the 

 anal, and the latter about half way from its basis to that of the caudal 

 fin. The dorsal fiu, laid backward, reaches the line of the base of the 

 first anal ray. The first dorsal ray is a little nearer the end of the muz- 

 zle than the origin of the caudal fin. The muzzle is very obtuse, and, if 

 the si)ecimen be not distorted, not longer than the diameter of the orbit. 

 The gape extends at least to the posterior line of the orbit. The subor- 

 bital region is deep posteriorly. In its present somewhat distorted con- 

 dition, the specimen measures in — 



M. 



Total length 0.059 



Head ; 016 



Vertebrte : 029 



Caudal liu 0142 



Length dorsal spine 008 



Length anal spine 008 



Length hair-like bodies 0005 



From the paper-coal of Osino, Nevada. 



AMYZON. Cope, Gen. Nov. Catostomidarum. 

 Proceed. Amer. Philos. Soc, 1872, p. 480. 



Allied to Buhalichthys. Dorsal fin elongate, with a few fulcra! spines 

 in front, and the anterior jointed rays osseous for a considerable part of 

 the length;- a few short osseous rays at front of anal fin; scales cycloid; 

 caudol fin emargiuate; mouth rather large, terminal. 

 i The characters of this genus appear to be those of the GatostomidoB. 

 There are three broad branchiostegals. The vertebrae are short, and 

 the hsema sijiues of the caudal fin are distinct and rather narrow. In 

 one specimen a pharyngeal bone is completely preserved. Not having 

 it before me at the moment, I merely observe that it is slender, and 

 with elongate inferior limb. The teeth are arranged comb-like, are 

 truncate, and number about thirty to forty. This and other portions of 

 the structure will be more fully described when the whole series of spe- 

 cimens is investigated. The bones bordering the mouth above are a 

 little disj)laced, and the lower jaw projects beyond them', and is directed 

 obliquely upward. The dentary bone is slender and toothless, and the 

 angular is distinct. The premaxillary appears to extend beneath the 

 whole length of the maxillary. Should this feature be substantiated, it 

 will indicate a resemblance to Cyprinidse. The maxillary' has a high 

 expansion of its superior margin, and then contracts toward its extrem- 



