106 BULLETIN" 15 8, tJKlTED STATES NATIONAL MUSEUM 



Atlantic, Skager Eak (Cleve) ; Narragansett Bay (Williams) ; Gulf 

 of Maine (Bigelow) ; Nova Scotia (Willey) ; Woods Hole (Wheeler, 

 Fish); Chesapeake Bay (Wilson). 



Colo7\— Body transparent, with a faint bluish tinge ; on the dorsal 

 surface of the metasome over the mouth, and on the ventral surface 

 between the mouth parts and between the bases of the swimming legs, 

 may usually be found small patches of a light brown or reddish 

 brown. 



Female. — Metasome obovate, widest at about the center of the head, 

 tapering rapidly backward; corners of jfifth segment smoothly 

 rounded ; urosome about half as long as metasome ; genital and anal 

 segments equal in length, basal abdominal segment shorter; caudal 

 rami symmetrical, nine times as long as wide, ciliated on their inner 

 margins, the outer setae halfway between the center and tlie tip; 

 inner spine of end segment of fifth legs shorter than the two apical 

 spines, which are subequal in length. Total length, 1-1.5 mm. 



Male. — Urosome much longer and narrower than in the female; 

 none of the caudal setae enlarged at their base ; corners of fifth seg- 

 ment smoothly rounded; terminal segment of left fifth exopod nar- 

 rower than the basal segment, tipped with a short spine and a long 

 seta; endopod but little enlarged at the base and nearly straight; 

 terminal segment of right fifth leg turned abruptly inward at a right 

 angle near its base and armed with a strong spine on its posterior 

 surface ; apical claw short and stout. Total length, 1-1.35 mm. 



Re7narks. — This is one of the most common calanoid copepods 

 around Woods Hole and often swarms in immense schools at the 

 surface, such as the one from which Edwards obtained his pint of 

 specimens. Fish recorded that in Woods Hole Harbor during win- 

 ter this copepod formed the greater part of the plankton, while in 

 fall and spring hardly an adult was found. They appear in great- 

 est numbers in March and February, and are hence of much eco- 

 nomic value. The fact that all the specimens in the United States 

 National Museum were captured at the surface, and that Rathbun 

 in his extensive collecting did not obtain even a single specimen in 

 the trawl wings, emphasizes the testimony of various collectors that 

 this is a surface species. 



TEMOKA TURBINATA (Dana) 



FiGUKE 71 



Calanus turMnatus Dana, Proc. Amer. Acad. Arts and Sci., vol. 2, p. 12, 1849. 

 Temora turbinata Giesbeecht, Fauna und Flora des Golfes von Neapel, vol. 

 19, p. 329, pis. 17, 38, 1892. 



Occurrence. — Six females from a surface tow on Georges Bank, 

 September, 1872. 



