Body very elongated, depressed t±irough length. Width at pectoral equals 

 or a httle more than greatest depth . Snout equal to horizontal diameter of eye 

 and in smaller examples a little smaller. Lower jaw projecting. Suborbital 

 and bones of snout reduced, region covered by a mucus membrane . Lower jaw 

 with large slime pores. Body lighter above, darker below, reaching a blue-black 

 on abdomen, ventral and pectoral and gill membranes. All fins intensely blue- 

 black. (Below follow measurements average and range, in 12 examples.) 



Measurements of Bathyagonus nigripinnis from Bering Island 



(12 examples) 



Character 



Average 



Total length 



Range 



90-239 mm 



in percentage of body length (without caudal) 



Head 



Head width 



Snout 



Eye 



Interorbital 



Least body depth 



Greatest body depth 



Peduncle width 



Predorsal 



Preventral 



Preanal 



Pectoral length 



Ventral length 

 Base 1st dorsal 

 Base 2nd dorsal 

 Anal base 



19.0-22.9 

 12.3-16.0 



5.5-6.8 



5.6-6.8 (7.7) 



1.6-2.4 



7.6-9.8 



1.8-2.5 



2.3-3.1 



26.2-31.3 



19.0-23.0 



43.0-49.3 



16.2-19.9 



5.1-8.5 

 13.2-16.6 

 12.4-15.3 

 14.1-17.6 



35 



