NO. 2149. JAPANESE MACROUROID FISHES— GILBERT AND HUBBS. 161 



of preopercle, 26.7; length of snout, 16; length of maxillary, 30; 

 length of barbel, 1.6 ; greatest depth of body, 42 ; width of body over 

 pectoral bases, 21 ; distance from anus to base of outer ventral ray, 

 31 ; distance from base of outer ventral ray to isthmus, 31 ; height of 

 second dorsal spine, 63; length of first dorsal base, 22; interdorsal 

 space, 11.5 ; height of second dorsal, 5 ; height of anal, 13 ; length of 

 pectoral rays — first, 8.7; second, 56; third, 77; outer ventral ray, 

 120+, second ventral ray, 32. 



7. NEMATONURUS PECTORALIS (Gilbert). 



Macrurus (Malacocephalus) pectoralis Gilbert, Proc. U. S. Nat. Mus., vol. 



14, 1891, p. 563. 

 Macmrus (Nematonums) magnus Gill and Townsend, Proc. Biol. Soc. 



Washington, vol. 2, 1897, p. 234. 

 Albatrossia pectoralis Jordan and Evermann, Fishes of North and Middle 



America, vol. 3, 1898, p. 2573. 



Other specimens were dredged, but not preserved, at stations 5044 

 and 5045 (in 359 fathoms). 



The Japanese specimens are identical with a series from Alaska. 



Contrary to the type description, the ventral filament usually 

 reaches not more than two-thirds, instead of five-sixths, the distance 

 from the ventral base to the anus. Interdorsal space 0.4 to 0.9 the 

 base of the first dorsal. 



Pyloric caeca very long, about as long as the head, 16 in number in 

 two specimens counted. 



The scales show great variation in the same individuals as regards 

 their spmation. Those on the head and belly usually bear a nearly 

 smooth median ridge, and frequently a divergent lateral pair; those 

 on the back and sides usually bear three moderately divergent ridges, 

 armed with 3 to 7 nonimbricated spinules; other scales, however, 

 bearing about 7 (4 to 10) nearly parallel ridges, are grouped in cer- 

 tain very definite areas, which are located as follows in six large 

 Alaskan specimens: 



1. Left side, none. Right side, about eight rows of scales extend- 

 ing obliquely backward and downward from the first dorsal, across 

 the back and sides. 



2. Left side, several scales scattered at intervals between lateral 

 line and dorsal base. Right side, a few scales above middle of anal 

 base. 



36399°— Proc.N.M.vol.51— 16 11 



