58 BULLETIN 150, UNITED STATES NATIONAL MUSEUM 



U*. Dorsal 45; prickles frequently 



present. Asiatic. 



\K Inner teeth stout, strongly 



trilobed; jaws nearly equal; 



body stout. Saghalin, Ok- 



hotsh Sea ochotensis. 



V^ Inner teeth slender, weakly 

 trilobed; upper jaw project- 

 ing and exposing nearly all of 

 the teeth in front. Southern 

 part of the Japan Sea_ingens. 

 T2. Head pointed; width of head about 

 equal to the depth; head and 

 body not resembling the tide- 

 pool forms, having more the 

 appearance of deep-water forms; 

 snout to disk not over 7 in the 

 length. Flesh pinkish. Okhotsh 



Sea rhodosoma. 



T*. Head exceptionally heavy and blunt; 

 snout not projecting, broadly 

 rounded; width of head about 

 equal to the depth; head and 

 body not resembling the tide- 

 pool forms; snout to disk 7.8-8.4 

 in the length of the body without 

 the caudal. Flesh not pinkish. 



Bering Sea megacephalus. 



O*. Pectoral unnotched in the adult and possibly 

 in the young. 



W. Dorsal 28 antarctica. 



W^. Dorsal 40 or more. 



X'. Pectoral 32 steineni. 



X2. Pectoral about 40. 



Y'. Head flattened in the 

 nasal region, snout 

 low and projecting 

 tanakae. 

 Y^. Head convex in the 

 nasal region, not de- 

 pressed; snout deep 

 and short, not pro- 

 jecting owstoni. 



B*. Caudal connected to the dorsal for three-fourths or more of its length; 

 pectoral notched; the number of pectoral rays equal to or less than the 

 number of anal rays. 



Z^ Gill opening above 

 the pectoral or in 

 front of 1 to 4 



rays pulchellus. 



Z^. Gill opening in front 

 of about 16 pectoral 

 rays tessellatus. 



