196 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



reaching only half way to ventrals. Color silvery; the scales punctate 

 with blackish ; a dark band from the shoulders to the base of caudal ; 

 4inother from the end of the muzzle, across operculum, to base of anal. 

 Head 4|; depth 4. D. 8; A. 7; scales 12-53-11; teeth 2, 4-4, 2. L. 3 

 inches. Warm Springs, Utah. (Cope.) 



(Rybopsis biviUatus Cope, Hayden's Geo!. Snrv. Terr, for 1871, 1872, 474.) 



^S5. M.. tiinpano^ensis (Cope) J. & G. 



Body stout, rather compressed. Head heavy. Mouth oblique. Eye 

 longer than muzzle, 3^ in head. Dorsal fin slightly in front of ven- 

 trals; pectorals not reaching to ventrals, the latter reaching vent. 

 Lateral line more or less incomplete (in the typical exami>les, which are 

 :all young; it is probably complete in the adult). Color brownish; the 

 scales finely dusted with black points; a plumbeous lateral streak; 

 cheeks silvery ; fins dusky. Head 3f ; depth 4 ; scales 13-52-6 ; teeth 

 2, 4-4, 2. L. 2 inches. Streams of Utah. {Cope.) This species and 

 the preceding are perhaps young Sqiialii. 



{Hybopsin timpanogensis Cojie, Proc. Amer. Phil. Soc. Phila. 1874, l:J4 : HybopsU tim- 

 panoffensis Cope & Yarrow, Zool. Wheeler's Expl. W. 100th Mer. 6.54.) 



«. Scales comparatively small, more or less closely imbricated, and with the exposed 

 edges deep (as iu Codoma and Luxilus) ; scales in front of dorsal small ; teeth 

 ^N-ith the grinding surface more or less developed. (Lythrurus Jordan.*) 

 d. A black spot at bane of dorsal in front. 



:286. M. cyanoceplialllS (Copeland) B.iij.— Hoy's Red-fish. 



Body short, stout, chubby, moderately compressed. Dorsal outline 

 elevated, the axis of the body being half nearer the ventral outline 

 than the dorsal. Caudal peduncle short, not contracted, tbe form re- 

 ssembling that of Pimephales. Head very short, deep, its greatest depth 

 three-fourths its length. Snout blunt, shorter than eye. Mouth large, 

 very oblique, lower jaw x^rojecting, maxillary reaching to border of eye. 

 'Eye large, 3^ in head, not so wide as the interorbital space. Fins large. 

 Dorsal well behind ventrals, its longest ray about as long as head ; pec- 

 torals not reaching ventrals, the latter to anal. Scales small, much 

 crowded anteriorly, La^teral line strongly decurved. Dorsal scales 

 small; thoracic region mostly naked. Coloration dark bluish above; 

 sides not silvery. Males in spring profusely covered with small tuber- 

 cles; the sides and fins clear, bright red; the back, and especially the 

 top of the head, of a clear glaucous blue. Dorsal fin in both sexes with. 

 a large black spot at the base of its anterior rays, this spot about as 



•Jordan, Man. Vert. 187G, 272: type Semotilus diplemius Raf. {XvOpov, blood; 

 ■dvpa, tail.) 



