Jordan and Evermann. Fishes of North America. 1963 



head. Teeth small, uniform, in narrow bands in the jaws; vomer with a 

 narrow patch ; palatines smooth. Eyes small, separated by a narrow, flat 

 interspace, as wide as pupil. Margin of preopercle evenly rounded, with- 

 out developed spine, a minute spinous point sometimes occupying the 

 position of the upper preopercular spine; opercle without spine; tubes 

 and pores of head extraordinarily developed. A series of 6 very large 

 pores across cheek and on lower edge of preorbital ; a large median pore 

 at symphysis, and a series of 7 occupying each ramus and extending onto 

 edge of preoperc-le; similar somewhat smaller pores form the supraorbital 

 series. Branchiostegals (5. (Jill membranes broadly united to the isthmus, 

 without free fold; no pore behind last gill. Dorsal and jinsil fins very 

 long and low, the dorsal spines very slender, the notch shallow between 

 spinous and soft portions; pectorals reaching beyond front of anal; ven- 

 trals usually to vent. About f of our specimens have the back and sides 

 completely invested with minute close-set prickles, the head and belly 

 and a narrow area along base of anal naked; caudal peduncle also naked 

 in varying degree. In the remaining third (possibly males) the body is 

 smooth except for a postaxial band of prickles, and in 1 specimen these 

 are absent, leaving the body entirely naked. Lateral line variously in- 

 complete, interrupted at some point under posterior half of second dorsal. 

 Color light olive with darker markings, which may, on the head, take the 

 form of vermiculating lines; 7 quadrate dark blotches along base of dorsal 

 fin, the first and third usually narrower than the others, an eighth on back 

 of caudal peduncle; very distinctly marked individuals show a series of 

 blotches along middle of sides, which may be connected with the dorsal 

 series by broad dusk.y bars; dorsal, caudal, and pectoral with faint bars; 

 ventrals and anal unmarked. We subjoin table of fin rays in 12 speci- 

 mens : 



Numerous specimens were obtained in shallow water along the shore of 

 Upper Klaiuath Lake on a bottom of fine sediment and vegetable debris. 

 This ditfers widely from any other species of Coitus in the very narrow, 

 slender form, the long fins, and especially in the extreme development of 

 the mucous tubes and pores. Klamath Lakes, Oregon. (Gilbert.) (prin- 

 ceps, chief. ) 



Coitus princeps, GILBERT, Bull. U. S. Fish Comm. 1897, 12, figure, Upper Klamath Lake, 

 Oregon. (Type, Xo. 48227. Coll. Gilbert, Cramer, and Otaki.) 



730. URANIDEA, De Kay. 

 rranidea, DE KAY, New York Fauna: Fishes, 61, 1842 (quie8cen8=gracilis). 



This genus is very close to Coitus, from which it differs in the reduction 

 of its veutrals to a concealed spine and 3 soft rays, a step further in the 

 degeneration characteristic of fresh- water types. The skin is smooth, or 



