G94 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



merous, and arc very dillicult to distinguish, all being very similar in 

 form and coloration. The relations of this genus to Coitus are very 

 dose, (uupavvq, the sky ; eidtu, to look.) 



. Palatines with teeth; ventrals I, 4 (except in 1059). 



l>. Pretiperenlar spine lar^e, strongly hooked; skin above with coarse prickles. 

 (Tauridea* Jordan & Rice.) 



1 <>.!. U. spilota Cope. 



Olivaceous, finely speckled and mottled with darker; belly white; 

 tins mottled. Body contracted at front of anal, subterete posteriorly. 

 Head very broad and flat; no occipital prominences; preopercular spine 

 extremely large, as long as eye, hooked upward; below it are three 

 small spines directed downwards; subopercular spine strong; space 

 above lateral line behind head, covered with small stiff prickles, coarser 

 t han in U. aspera and farther apart, slightly hooked backward; no spines 

 behind axil; isthmus broad, the gill-membranes fully joined to it, not 

 forming a fold. Head 3-?-; depth 5J. . D. VIII-17; A. 12. Great Lakes, 

 in deep water, and northward to Hudson's Bay. 



(Ur<inidi xpilota Cope, Proc. Acad. Nat. Sei. Phila. 1865, 8'2: Cotlopsis ri<-<i Nelson, 

 Bull. IIls.'Mus. Nat. Hi-st. 187(5: Tauridea spilota Jordan, Man. Vert. E. U.S. 255: Cot- 

 lop*i* x/i7o/* Jordan, Proc. Acad. Nat. Sei. Phila. 1877, 81; Bean, Proc. U. S. Nat. 

 Mus. 1881, 127; specimens from near Hudson's Bay, said to have no palatine teeth.) 



bb. Prrtiprreular spine small, more or less perfectly concealed in the skin, 

 c. Skin almost everywhere villous. (CoUopsis\ Girard.) 



1OS5. U. aspcra (Rich.) J. & G. 



Grayish olive, much mottled and barred; fins finely variegated; 

 usually a large black blotch on posterior part of spinons dorsal, 

 liody rather stout, compressed behind. Head rather broad, traus- 

 \ersely convex; opercle and preoperele with the usual spines, all small 

 and nearly concealed in the skin; interorbital .space broad and llattish, 

 broader than eye (in adults); skin covered with small close-set prickles, 

 forming a villous covering, the prickles smaller, stiller, and more closely 

 set than in the next species; head, belly, caudal peduncle, and space 

 along dorsal smooth, or nearly so; pectorals reaching anal; ventrals, 

 I. L, nearly reaching vent; dorsal spine slender: lateral line complete, 

 angularly bent belo\\ last rays of second dorsal. Head 3; depth 4. 

 I). X-i'l: A. IS. L. 10 inches. Streams west of the Sierra Nevada 



'Jordan A Ki" . Man. Vert E. U. 8. ed. 2, 1878, 256: tjpe i't>tiim* rim Nelson. 



( r<n-/><:, r<>\\ : / i8t < . appearauer. i 



i.irard. 1'mc. liust. Sue. Nat. 1 1 ist. iii, 30:5, 1850; type t'utlus aspcr Rich. (orro5, 

 (.'titlua; iiif,'i-. appi-ar:iii<-e.j 



