PLECTOSPONDYLI CYPKINIDAE APOCOPE OSCULA. 



047 



longitudinal blackish line on the thoracic region on each side. The median 

 band is darker spotted, and there are blackish spots on the dorsal region. 

 Head black above ; chin red. Upper lip separated by a fold. 



Abundant at Provo, Utah. Also from Logan, Utah. This species 

 sometimes lacks the maxillary barbels. A specimen of this character, with 

 a slight scale variation, gave rise to the second name above cited. 



APOCOPE OSCULA, Gir. 



lArgyrcus osculus, Gitt., U. S. & Mex. Bound. Surv., pt. ii, Ichthyology, 47, pi. xxvii, 



figs. 9-12. 

 Rhinichthys henshavii, var II, COPE, Proc. Am. Phil. Soc. Phila., 187-1, April, 133. 



This species differs from the typical A. liensliavii in having longer and 

 more attenuated body and narrow sharp pointed muzzle. Depth enters total 

 length 7.5 times; the head entering the same 4.75 times. Eye 4.50 in length 

 of head; 1.5 in interorbital width. The base of the Dorsal I is intermediate be- 

 tween the base of the caudal fin and end of the snout, Ventral fins nearly 

 reach the anal, but are not reached by the pectoral. Dorsal fin originating 

 behind the base of the ventrals. Radii: D. I. 8 ; A. I. 7 ; V. 8 ; P. 12. Scales 



10 



small, 6JJ. Color yellowish-white on back, bright-yellow on belly ; broad 



10 



blackish band extending from occiput to Dorsal I ; broad lateral band from 

 posterior rim of orbit to a line drawn vertically from insertion of anal ; 

 narrow black stripe extending from anterior rim of orbit around end of 

 muzzle beneath nostrils. Under lip in life light-red. Inferior fins crimson. 



