COPEPODS OP THE WOODS HOLE BEGION 



73 



depth of 850 fathoms, while those here recorded were captured at 

 even greater depths, which would indicate that this is a deep-water 

 copepod living usually near the bottom. It has never before been 

 reported from our American shores, though found in considerable 

 abundance off Ireland. 



XANTHOCALANUS PROPINQUUS G. O. Bars 

 FiGUKB 49 



Xanthocalanus propinquus Saes, Crustacea of Norway, vol. 4, p. 48, pi. 33, 1901. 



Occurrence. — A single male from the trawl wings, Station 2230, 

 Albatross, south of Long Island. 



Distribution. — Arctic Ocean, 

 Norwegian coast (Sars) ; Ant- 

 arctic Ocean (Wolfenden). 



Color. — Body transparent 

 and colorless, without any no- 

 ticeable pigment, but with a 

 faint whitish tinge; eye bright 

 ruby red. (Rathbun.) 



Female. — Head distinctly 

 separated from the first seg- 

 ment; fifth segment also sep- 

 arated from the fourth, its 

 posterior corners produced into 

 acute triangular processes 

 reaching the center of the geni- 

 tal segment; urosome one-third 

 as long as metasome; posterior 

 surface of second, third, and 

 fourth endopods with rows of 

 small spines; fifth leg seg- 

 ments as wide as long, basal 

 segment with a fringe of coarse 

 spines on its inner margin, second segment fringed with short hairs, 

 end segment with a large terminal spine, and three smaller ones in 

 an oblique row on its outer margin, all four spines setose. Total 

 length, 1.75 mm. 



Male. — Head and fifth segment separated as in the female ; poste- 

 rior corners of the latter smoothly rounded and very short; fifth 

 legs extremely asymmetrical, the right one 3 ( ?4) segmented, not 

 reaching the center of the first segment of the left leg and tipped 

 with a small spine and a triangular process, the latter possibly the 

 rudiment of a fourth segment; left leg 5-segmented, reaching far 

 beyond the tips of the caudal rami. Total length, 2.4 mm. 



Figure 49. — Xanthocalanus propinquus: a, 

 Male, dorsal ; i, male, fifth legs ; c, male, 

 end segment of right fifth leg ; d, fem'ale, 

 fifth legs (after Sars) 



