54 



BULLETIN OF THE BUREAU OF FISHERIES. 



The last split ray of dorsal and anal are counted each as a single ray. 



The species is abundant throughout eastern Bering Sea, extending as far west as the Commander 

 Islands. It is taken in shallow water with hook and line and has been dredged to a depth of 54 fathoms. 



List of Stations. 



Fig. 10. — Hemilepidolus zapus, new species. Type. 



Hemilepidotus zapus, new species. (Fig. 10 and loa.) 



Type, a male, 127 mm. long, from station 4782, near Attn Island; depth 57 to 59 fathoms. 



Closely related to Hemilepidotus gilberti from Japan, agreeing with that species in the ventral fins 

 of the male which are greatly produced and with exserted rays bearing series of elevated papillse on 

 the inferior surface. It differs from Hemilepidotus gilberti in the narrower interorbital and in the reduc- 

 tion in the number of pores in the lateral line and in the rays of dorsal, anal, and pectoral fins. 



Measurements in hundredths of length without caudal: Length of head 39; length of snout 11.5; 

 diameter of orbit 12; interorbital width 4; distance from tip of snout to end of maxillarj' 18; greatest 

 depth of body 30; least depth of caudal peduncle 7.5; length of second dorsal spine 10: third spine 8: 

 membrane at anterior base of fourth spine 4; fomlh spine 12; highest (fifth and sixth) spines 13; last 

 spine 7; highest dorsal ray 17; caudal fin 23; ventrals 40; pectorals 34. 



Dorsal m, vni, 20; anal 17; pectoral 16; pores in lateral line (including those on base of caudal 

 fin) 51 and 53. The last ray of dorsal and anal fins is cleft to the base, the halves sometimes separated 

 at base. They are here always enumerated as one ray. The following table gives variation in lateral 

 line pores and fin rays in 15 specimens of the species: 



