204 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



series. Lateral line short or uearly obsolete. (Dorsal fin not described.) 

 Anal basis short. Small fishes, differing from Minnilus in the incom- 

 plete condition of the lateral line 5 possibly merely the young of some 

 Squalius. {-pwroc;^ before ; nopoc^ pore.) 

 307. P. dofiiasaiuus Cope. 



Body rather stout, front convex. Muzzle obtuse. Mouth horizontal^ 

 end of maxillary not quite reaching orbit. Eye 4 in head. Lateral 

 line not develoijed as far as the ventral fins. Grayish ; a broad dark 

 lateral band, spotted with darker; back and top of head dark. Head 

 4^ ; depth 5. D. 8 ; A. 7 ; scales {>-56-6 ; teeth 2, 4-4, 1. L. 2 inches. 

 Fort Hall, Idaho. {Cope.) 



(Cope, Haydeu's Geol. Surv. Mont. 1871, 47:5, 187-2.) 



87.-EKICYITiBA Cope. 

 (Cope, Proc. Aeficl. N;it. Sci. Phila. 18G5, 88 : type Ericymha buccata Cope.) 



Body rather elongate, little compressed. Muzzle broad. Interoper- 

 cle, suborbital, and dentary bones crossed by conspicuous, externally 

 visible, mucous channels. Lips thin. No barbel. Teeth 1, 4-4, 0, 

 without grinding surface, hooked, the edges entire. Scales rather large. 

 Lateral line continuous. Dorsal fin above ventrals. Anal basis short. 

 Silvery fishes of rather small size, known at once from all other min- 

 nows by the cavernous bones of the lower jjart of head, {ipi, an inten- 

 sive particle; -/.uu^rj^ a cavity; in allusion to the development of the mu- 

 cous channels.) 

 SOS. E. I>uc4>.ata Cope. 



Body fusiform, rather elongate, little compressed, the back not ele- 

 vated. Head rather long, somewhat depressed above, with broad and 

 prominent muzzle. Mouth rather small, horizontal, subinferior, the 

 lower jaw considerably shorter than upper, upper lip below level of 

 pupil, n)axillary not reaching to eye, dentary bones dilated, the mu- 

 cous channels conspicuous. Suborbital very broad, silvery, with an 

 elevated longitudinal ridge and conspicuous cross-lines; opercle small. 

 Eye large, 4 in head. Pius small, dorsal over ventrals. Scales mod- 

 erate. Lateral line nearly straight. Breast scAleless; 15 large scales 

 before dorsal. Color oUvaceous, rather pale ; sides bright silvery, with 

 bluish reflections ; a dark dorsal streak, conspicuous posteriorly ; fins 

 plain; males without tubercles or bright colors. Head 3|; depth 5. 

 D. 8; A. 8; scales 5-33-3; teeth 1, 4-4, 0. L. 5 inches. Ohio Valley 

 to Mississippi {Hay); locally very abundant. One of our most remark- 

 able species of Cyprinidce. 



(C()i»\ Proc. Ac;i.(l. N:it. Sci. Phila. 18(>r>, HI. and Cypr. Peiiii. ii'U ; Giinthcr, vii, 185. > 



