Jordan and Evcrmann.— Fishes of North America. 



1943 



gg. Aual rays 11 to 13, usually 13. 



ft. Caudal peduncle very slender; its least depth not much 

 greater than diameter of eye ; hody and head profusely 

 speckled. rUNCTULATUS, 2319. 



m. Caudal peduncle deep, its least depth equal to length of 

 snout ; back and sides less distinctly speckled. 

 i. Head blunt, low, rounded anteriorly; body with 

 vague dark clouds or specks, not very distinctly 

 barred; skin smooth or variously prickly, some- 

 times very rough, sometimes perfectly smooth. 



SEMISCABEK, 2320. 



ii. Head less rounded, with a median depression ; body 

 usuaUy with broad, oblique, dark bars; axil 

 usually with some flue prickles, the back smooth. 



ICTALOPS,2321. 



TaURIDEA (ravpa, cow; eE6os, appearance): , , , , 



6&. Prcopercular spine very large, as large aa eye, aud spirally hooked; back with 



stiffish prickles. 



j. Dorsal VIII, 17 ; anal 12; head very broad aud flat ; body olivaceous, finely 



speckled and motled. kicei, 2322. 



COTTUS: 



aa. Palatine teeth wanting (rarely a few developed m males). ,. , , 



fc. Preopercle with a spine at its angle, below which are 2 others directed 



downward. 



I. Back and Hides more or less prickly; dorsals connected; lateral line com- 



nlete- preopercle with a long claw -like spine; dorsal VIII, 17; anal 13. 



^ ' i r ONYCHUS, 2323. 



U. Back and sides smooth or prickly behind axil only. 



w Preopercular spine long, curved upward in a spiral; dorsal fins low, 

 connected ; dorsals VII-19 ; anal 13. pollicaeis, 2324. 



mm. Preopercular spine curved upward; pectoral as long as head; dor- 

 sal Vin, 18 ; anal 14. cognatus, 2325. 

 mmm. Preopercular spine very short, hooked upward; dorsals well 

 connected, the spines low, the soft rays high; lateral line 

 incomplete. Lower preopercular spines well developed ; D. 

 VII 21 ■ A. 15. PEBPLEXUS, 2326. 

 H-. Preopercle with a single short spine at its tip only, and no diatinct spines 

 below it, the lower spines reduced to angles of the bone. 

 n Posterior nostrils iu short, but.conspicuous tubes;* dorsals connected; 

 skin smooth or nearly so; dorsal VII to X, 18 or 19; anal 13 or 14. 

 o. Lateral line very incomplete. klamatheksis, 2827. 

 00. Lateral line complete or nearly so. 



«. Dorsal spines IX or X. aleuticus, 2328. 



yp. Dorsal spines VII. MiNUTUS, 2329. 



nn. Posterior nostrils without tubes; skin nearly smooth; D.VnorVHI. 

 16 to 18 ; anal 12 to 14. 

 q. Head moderate, 3i to 4 in length. 



r. Mouth rather large, the maxillary 2| in head, reaching to 



opposite middle of eye. 



8. Depth 4J to 5 in length. beldingii, 2330. 



s«. Depth 6 in length. PHILONIPS, 2331. 



rr Mouth very small, the maxillary 3f in head, reaching iront 



of pupil. ^N«^' 2332. 



qq. Head larger, 3i in length; depth 5; body much spotted. 



^^ o 4 SPILOT0S, 2333. 



Not described in Qottus minutus. 



