70 



BULLETIN 15 8, UNITED STATES NATIONAL MUSEUM 



XANTHOCALANUS SUBAGILIS Wolfenden 



Figure 46 



Xanthocalanus subaffilis Wolfenden, Journ. Marine Biol. Assoc, new ser., vol. 

 7, p. 118, pi. 9, figa 17, 32, 1904. 



Occurrence. — Five females from the trawl wings, Stations 2093, 

 2173, Albatross, south of Marthas Vineyard. 

 Distribution. — North Atlantic (Wolfenden). 



Color. — Unrecorded for the living copepod ; pre- 

 served sj)ecimens are a uniform light yellowish 

 brown. 



Femule. — Head separated from the first seg- 

 ment; fourth and fifth segments fused, the pos- 

 terior corners sharply angular; metasome three 

 and one-half times as long as urosome; terminal 

 segment of fifth legs with three setae unequal in 

 size, the middle one larger than the other two; 

 inner margin of second segment smooth, of basal 

 segment with a rounded knob at the distal corner, 

 fringed with short hairs; posterior surface of 

 end segment with a few scattered hairs. Total 

 length, 2.5-2.75 mm. 



Male. — Left fifth leg 4-segmented, the terminal 



segment with two apical processes, one fingerlike 



and fringed with short hairs, the other subspheri- 



,„ ^ ,, cal and tipped with three unequal setae; right 



Figure 46. — Xatithoca- ^ '^ ^ 9 to 



latius suhagiiis: a, Fe- fifth leg 6-segmented, about as long as the left 

 male fifth'^ie's^' ^ ^^^' ^^^ terminal segment long and needlelike. 



Total length, 2.3-2.5 mm. 

 Remarks. — With, in his report on the Copepoda of the Danish 

 /7i(7(9Z/-Expedition, made this species a doubtful synonym of Van- 

 hoffen's hirtipes, but the form of the fifth legs in both sexes distinctly 

 separates the two. This is the first record of the species from Ameri- 

 can shores. 



XANTHOCALANUS BOREALIS G. O. Sars 



Figure 47 



Xanthocalanus borealis Sars, Norwegian North Polar Expedition, 1893-1896, 

 vol. 1, no. 5, Crustacea, p. 49, pi. 11, 1900 ; Crustacea of Norway, vol. 4, p. 46, 

 pis. 31, 32, 1901. 



Occurrence. — Three females from trawl wings, Station 1029, Fish 

 Hawk, off Marthas Vineyard. 



Distribution. — North Atlantic (Farran) ; Polar Basin, Norwegian 

 coast (Sars) ; North Sea (van Breemen) ; English seas (T. Scott). 



Color. — Body in general translucent or transparent and whitish, 

 with some light orange coloring extending through the center. This 



