COPEPODS OF THE WOODS HOLE REGION 



37 



Distribution. — Canary Islands, Malta (Thompson) ; tropical At- 

 lantic and Pacific (Giesbrecht, Cleve) ; Gulf Stream south of Mar- 

 thas Vineyard (Wheeler, Sharpe) ; Indian Ocean (Thompson and 

 Scott) ; Adriatic (Steuer) ; California coast (Esterly) ; Gulf of 

 Guinea (T. Scott) ; North Sea (van Breeman). 



Color. — Both sexes transparent and colorless except for a few 

 small red spots irregularly arranged, which are sometimes present in 

 various parts of the body and appendages. In exceptional cases the 

 setae of the caudal rami and the first antennae are bright red; the 

 eye spot i« comparatively large and a deep ruby red. 



Female. — Body elongate and slender, metasome nearly cylindrical, 

 forehead somewhat angular; penultimate segment of fifth legs with 

 a single seta, end segment with five setae. Total length, 1-1.15 mm. 



Male. — Body and appendages, including the fifth legs, similar to 

 those of the female but a little smaller ; urosome, 4-segmented and 



FiGDEE 20. — Meci/nocera clausi: Female, dorsal, (From W. M. Wheeler) 



wider than in the female. Fifth legs not modified for prehension. 

 Total length, 0.75-0.9 mm. 



Remarks. — This species may be recognized by the exceptionally 

 long first antennae and the comparatively small size of the copepod 

 itself. By a curious mistake nearly every investigator since Thomp- 

 son has reported the male as unknown, yet it is included in Thomp- 

 son's original description and was more fully described and figured 

 by T. Scott in 1894 in his report on the copepods of the Gulf of 

 Guinea. 



Family PARACALANIDAE 



Genus PARACALANUS Boeck, 1865 



Head fused with first segment and slightly carinated dorsally in 

 the male; fifth segment with rounded posterior corners; urosome 4- 

 segmented in female, 5-segmented in male; caudal rami short and 



