2 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 71 



6*. Nasal spines present. 



&. Occiput without bony tubercles, slightly concave. 



rf\ Lateral line with 22 to 26 pores; maxillary barbel sometimes 



branched pacificus. 



<^^ Lateral line with more than 26 pores. 



e\ Lateral line with 27 to 33 pores; maxillary barbel always 

 simple ; a round black spot on front of dorsal in male. 



ochotensis. 

 C-. Lateral line with 31 to 34 pores ; cirri on head reduced ; no 

 round black spot on front of dorsal in male. 



(ochotensis) camchaticus. 

 c*. Occiput with bony tubercles. 



(Z*. Bony tubercles on occiput, round, directed upward, 

 d". Bony tubercles on occiput, elongate, triangular in shape, spine- 

 like or ridge-like, directed backward. 



e^. Bony tubercles on occiput two in number dydymovi. 



e^. Bony tubercles on occiput four schmidti. 



f. Lateral line with 27 to 30 pores ; cross bands on dorsal 

 fin of male formed by row of round white spots. 



uncinatus. 

 /'. Lateral line with 20 to 23 pores ; white cross bands on 



dorsal fin of male continuous europaeus. 



a\ Skin more or less beset with cutaneous prickles. 



&\ Prickles on head, occiput back and over lateral line ; cirri almost com- 

 pletely absent scaber. 



v. Prickles on head, occiput and below the first dorsal ; cirri well devel- 

 oped, present in two rows upon first third of lateral line. 



(scaber) beringianus. 



ARTEDIELLUS PACIFICUS Gilbert (1893) 

 D. VII-VIII, 12-13 ; A. 11-12 ; P. 22-24 ; Y. I, 3 ; L. lat. 22-26. 



This first described Pacific species differs chiefly from all the 

 Atlantic and Arctic species known by the absence of the blunt bony 

 protuberances on the occiput, and from other Pacific species de- 

 scribed later by the smaller number of pores of the lateral line. 

 This number varies according to Gilbert and Jordan and Ever- 

 mann ^ from 22 to 26 pores and is more often 24 pores. Our single 

 specimen (Russian Academy of Science No. 13695 from the United 

 States National Museum Cat. No. 48657, Albatross station 3279, 

 56° 25' N., 162° 39' W.) has 25 pores. The number of pores on 

 the top of the head is small and the pores are inconspicuous. The 

 cutaneous cirri in our specimen are not much developed and the 

 maxillary barbel is short and simple. According to American 

 authors this barbel is sometimes large and compound, furnished 

 with 1-4 short lateral branches. This seems never to occur in other 

 Pacific species. 



Geographical distribution. — This species seems to be confined to 

 the eastern part of the North Pacific. It is found on the coasts of 



' Bull. U. S. Nat. Mus., No. 47, Fish. North and Middle Amer., pt. 2, 1898. p. 1006. 



