86 THE WASATCH AND BRIDGER FAUNiE. 



t30 — 10, vertical line counted a little behind the ventral fins. The line of 

 the extremities of the second dorsal and anal fins, marks the basal third of 

 the caudal fin. The dorsal spines are subcylindric, slightly curved, and 

 of nearly equal length; the length equals the depth of the body at the 

 middle of the second dorsal fin. 



The external series of villiform teeth are stout of their kind, conic, and 

 a little incurved. I cannot see the pharyngeal bones or teeth. 



The number of vertebrae which extends between the caudal fin and the 

 superior margin of the operculum, where one or more are concealed, is 

 twenty- five, of which fifteen are of the caudal portion (in two I can only 

 count fourteen). 



The mouth is directed obliquely upwards and is rather large; the man- 

 dible, when closed, does not project beyond the premaxillary border. The 

 maxillary, where preserved, is naiTOw distally, and does not project beyond 

 the posterior line of the orbit. The latter is rather small, and though not 

 well defined in any specimen, is not more than one-eighth the length of the 

 head, and 1.5 to 1.75 times inside of muzzle. The margins of all the oper- 

 cular bones are entire and smooth. The interoperculum is narrow, and lies 

 obliquely upwards, narrowing the operculum. The greatest width of the 

 latter is more than two-thirds its depth. The pelvic supports of the ventral 

 fins are simple, slender and in contact anteriorly, their length about half 

 that of the fin. The pectorals are not elongate. 



The scales extend over the top of the head, to or beyond the orbits. 



They also extend along the ramus of the under jaw. Those of the fins are 



quite small, they extend to a considerable distance on the unpaired and on 



the caudal fins. 



Measurements. 



M. 



Total Iciigtii of tho largest specimen 19 



Do. No. 2, smaller example (with caudal) l~ 



Length of hcail of do 014 



Depth of <ln. posteriorly alioiit 0156 



length of hasc of spinous dorsal OSCu 



Length of jjostcrior spinous ray 017 



Length of opercnliim 0125 



Length of ninxillnry bono nbont 0M5 



Depth No. 3, nt liase 1st dorsal 045 



Depth No. :t, at base annl, InI ray 0325 



Length of basis anal^bosis caudal 0162 



Iicngth of caudal fin , 034 



