REVISION OF THE FISH FAMILY LIPARIDAE 107 



V2. Pectoral notch deep; dorsal 

 55; anal 45; pectoral 33. 

 reinhardi. 

 T2. Body deep; depth less than 5. 

 W. Atlantic. 



X^. North Atlantic; lower 

 lobe of the pectoral 

 longer than the head; 

 disk 4.6__longipinnis. 

 X2. South Atlantic; lower 

 lobe of the pectoral 

 shorter than the head; 



disk 2 georgianus. 



W2. North Pacific. 



Lower lobe of the pectoral 

 shorter than the head; 



disk 3.3 phasma. 



S^. Disk smaller than the eye, rarely 

 equal to it; usually distinctly 

 cupped or triangular. 



Y'. Caudal not forked; 

 pectoral distinctly 

 notched. 

 Z'. Peritoneum silvery, 

 undotted; mouth 

 and gill-cavity 

 pale. 

 . Lower lobe of the pectoral nearly equal to the head or longer than the head; no 

 prickles. 



b'. Pacific, south of Alaska Peninsula spectrum. 



b^. Atlantic longipinnis. 



a*. Lower lobe of the pectoral about 2 in the head; Gulf of Tartary; cactuslike 



prickles present acanthodes. 



T?. Peritoneum black, 

 rarely silverj' and 

 dotted; mouth 

 and gill cavity 

 dusky to black; 

 no prickles; Brit- 

 ish Columbia to 

 California. 



melanurus. 



Y2. Caudal forked; the 



pectoral notch 



hardly evident or 



absent. 



c'. Depth 4.5; pectoral slightly notched; pyloric coeca 29 cypselurus. 



c^. Depth 4; pectoral unnotched; coeca 45 furcellus. 



R2. Pectoral with less than 25 rays; disk 

 deeply cupped, 

 d *. Upper pectoral ray not elongate; middle pectoral rays not rudimen- 

 tary. 



e'. Color pale; tail short abbreviatus. 



e*. Color black; tail attenuate bathycoetus. 



d^. Upper pectoral ray greatly elongate; middle pectoral rays rudi- 



