204 CONTKIliUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 
series. Lateral line short or nearly obsolete. (Dorsal fin not described.) 
Anal basis short. Small fishes, dilfering from Minnilus in the incom- 
plete condition of the lateral line; possibly merely the young of some 
Squalius. before ; nopoc^ i)ore.) 
307. F. doJUinisKis Cope. 
Body rather stout, front convex. Muzzle obtuse. Mouth horizontal, 
end of maxillary not quite reaching orbit. Eye 4 in head. Lateral 
line not developed 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. S ; A. 7 ; scales i)-5G-6 ; teeth 2, 4-4, 1. L. 2 inches. 
Fort Hall, Idaho. {Cope.) 
(Cope, Hayden’s Geol. Surv. Mont. 1871, 47S, 1872.) 
87.-EKICYI»IBA Cope! 
(Cope, Pi'oc. Acad. Nat. Sci. Phila. 1865, 88 : type Ericynha biiccata Cope.) 
Body rather elongate, little compressed. Muzzle broad. Interoper- 
cle, suborbital, and dentary bones crossed by conspicuous, externally 
visible, mucous channels. Lips thin. ISTo 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 part of head, {ipt, an inten- 
sive particle; xouj3-^^ a cavity; in allusion to the development of the mu- 
cous channels.) 
S08. E. bHCCata Cope. 
Body fusiform, rather elongate, little compressed, the back not ele- 
vated. Head rather long, somewhat depressed above, with broad and 
prominent muzzle. ]\Iouth rather small, horizontal, subinferior, the 
lower jaw considerably shorter than upper, ui)per lip below level of 
impil, maxillary not reaching to eye, dentary bones dilated, the mu- 
cous channels conspicuous. Suborbital very broad, silvery, with au 
elevated longitudinal ridge and conspicuous cross lines ; opercle small. 
Eye large, 4 in head. Fins small, dorsal over ventrals. Scales mod- 
erate. Lateral line nearly straight. Breast scaleless; 15 large scales 
before dorsal. Color olivaceous, rather jiale ; sides bright silvery, with 
bluish reflectious ; a dark dorsal streak, conspicuous posteriorly ; fins 
ifiain; 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' (Ha?/); locally very abundant. One of our most remark- 
able species of Cyprinidcc. 
(Cope, Prix.'. A(*;kI. Nut. Sci. Plula. 186.5. 87. aiicl Cypr. Pen.u. 661 ; Giiiither, vii,185.) 
