31. CYPRINIDJS MINNILUS. 197 



large as the eye; dorsal, anal, and ventrals blackish at tip. Head 4; 

 depth 4. U. 8; A. 12; scales 9-46-4; teeth 2, 4-4, 2. L. 21 inches. 

 Rivers of Southern Wisconsin, etc. 



(Lytlintrua cyanocephalus Copelaud, Proc. Acad. Nat. Sci. Phila. 1677, 70.) 



287. Ul. atripes (Jordan) Hay. 



Body moderately elongate, very strongly compressed and elevated. 

 Head comparatively pointed. Mouth rather large, quite oblique, the 

 maxillary reaching to the front of eye; lower jaw projecting. Eye 

 small, shorter than muzzle, 4 in head. Scales closely imbricated^ 

 crowded anteriorly. Lateral line strongly decurved. Dorsal fin be- 

 ginning midway between ventrals and anal, high anteriorly; pectorals 

 not quite reaching ventrals; the latter to vent Coloration of body 

 dark bluish, without traces of vertical bars; sides not silvery, the scales 

 dusted with dark puuctulatious; dorsal with the usual black spot at 

 base in front, smaller than in the other species; a black bar crosses its 

 upper part; anal colored like the dorsal, the markings paler; ventral 

 iius dusky. Males profusely tuberculate, and doubtless red in spring. 

 Head 4; depth 4. D. 7; A. 11; scales 9-52-5; teeth 2, 4-4, 2. L. 3 

 inches. Southern Illinois. This species, and possibly the preceding 

 also, niiiy be local varieties of M, diplemius. 



(/.i/tliriiniK utrqjts Jordan, Bull. Ills. Lab. Nat. Hist, ii, 59, 1878.) 



288. M. diptremius (Rat.) lluy.lied-Jin. 



Body elongate, compressed, little elevated, the caudal peduncle nota- 

 bly long. Head long, conic, rather pointed. Mouth large, moderately 

 oblique, the premaxillary oil the level of the pupil, the maxillary ex 

 tending to opposite the eye, lower jaw somewhat projecting. Eye mod- 

 erate, about equal to muzzle, 31 in head. Scales closely imbricated, 

 crowded anteriorly, the antedorsal scales about 3(^. Dorsal fin high, 

 inserted about midway between ventrals and anal ; pectorals not reach- 

 ing ventrals, the latter to vent; caudal fin long. Coloration dark steel- 

 blue above; pale or silvery below ; the males often showing traces of 8-KH 

 obscure cross-bars; a conspicuous spot at base of dorsal in front ; the 

 liii.- otherwise all plain. Males with the anterior dorsal region and the 

 head proiusely covered with small whitish tubercles, the belly and 

 lower lins being of a bright brick-red in the spring. Females very pale 

 olive, sometimes almost colorless. Head 4^ ; depth 4^-. D. 7 ; A. 11: 

 scales 9-47-3; teeth 2, 4-4, 2. L. 3^ inches. Ohio and Upper Missis- 

 sippi Valley and lake region; generally abundant in small, clear streams. 



(Semoiilus diplcmiux Eaf. Icbth. Oh. : llypsihyis diplcemia Cope, Proc. Acad. Nat. Sci. 

 Phila. 1807, l(h> ; Jordan, Man. Vert. 'J95. Leutim-un d'qihotduis of Kirtland and of Gun- 

 tlicr is Luxiluts cornuty.s.') 



