COPEPODS OF THE WOODS HOLE REGION 



69 



Occurrence. — A single male and female from trawl wings, Station 

 2230, Albatross, south of Long Island. 



Distribution. — Irish coast (Farran) ; south of Iceland (With) ; 

 North Sea (van Breemen) ; Monaco Expedition (Sars) ; Bay of 

 Biscay (With). 



Color. — Not yet observed in the living copepod. 



Female. — Head considerably narrowed anteriorly; posterior 

 corners of fifth segment short and sharply pointed; urosome only 

 one-fifth as long as metasome ; first antennae a little longer than the 

 body ; the three segments of the fifth legs about the same length ; the 

 three spines of the terminal 

 segment subequal in size, all 

 three ciliated; inner margins 

 of the two basal segments 

 with scattered spines; poste- 

 rior surface of terminal seg- 

 ment and distal end of second 

 segment densely covered with 

 stiff hairs. Total length, 

 5.5-6.5 mm. 



Male. — Posterior corners of 

 fifth segment sharper than in 

 the female ; basal segments of 

 first antennae considerably 

 enlarged, with tumid out- 

 growths ; urosome longer than 

 in the female; fifth legs slen- 

 der and elongate, each 5-seg- 

 mented, the right leg reaching 

 beyond the center of the third 

 segment of the left leg; the 

 latter shows a stout spine at 

 the inner distal corner of the 

 second segment, which may 

 represent the rudiments of 

 an endopod. Total length, 

 6.5 mm. 



Rema/rks. — The two specimens here recorded were both badly dam- 

 aged, so that any detailed description of the male is impossible. 

 Fortunately the fifth legs were uninjured, and are represented in 

 Figure 45, b. The tumid padlike outgrowths on the basal segments 

 of the first antennae are unique, but seem to be natural rather than 

 pathological; and, if so, furnish an excellent recognition character. 



FiGUHB 45. — Xanthocalanus greenii: a, Female, 

 dorsal (after Farran) ; 6, male, fifth legs ; 

 c, end segment of left fifth exopod ; d, female, 

 fifth leg 



