48 BULLETIN 158, UNITED STATES NATIONAL MUSEUM 



McHe. — Nearly as long as the female but more slender; spines at 

 posterior corners of fifth segment very small and mucronate; fifth 

 legs 5-segmented, right leg stouter than left, both legs with tiny rudi- 

 ments of an endopod on the inner margin of the second segment at 

 the distal corner. Total length, 4 mm. 



ReTrMTks. — According to Sars this species on the Norwegian coast 

 is a deep-water form, but he considered it probable that in more 

 northern latitudes it may ascend nearer to the surface. It is worthy 

 of note that 3 females of the species Chiridius ohtusifrons were ob- 

 tained by the Grampus at Station 20075, south of Cape Sable, Nova 

 Scotia. This is not within the present area, but is so close to it 

 that the species is likely to be found here at some future time. 



Genus CHIRUNDINA Giesbrecht, 1895 



Body elongate and rather slender, considerably narrowed anteri- 

 orly ; forehead with or without crest ; rostrum short and undivided ; 

 head fused with the first segment; fourth and fifth segments also 

 fused, the posterior corners sharp in the female, rounded in the 

 male; exopod of second antenna twice as long as endopod, 7-seg- 

 mented; exopods of first four pairs of legs 3-segmented, except in 

 the first legs of the female, where it is sometimes 2-segmented ; first 

 endopod 1-segmented, second 2-segmented, third and fourth 3-seg- 

 mented ; fifth legs lacking in female, present in male. 



KEY TO THE SPECIES (BOTH SEXES) 



1. Forehead with crest ; genital segment symmetrical ; exopod of 



first legs in female with only 2 segments streetsii (p. 48) 



Forehead without crest; genital segment asymmetrical; exopod 

 of first legs in female with 3 segments pustulifera (p. 49) 



CHIRUNDINA STREETSII Giesbrecht 



FiGUKE 29 



Chirundina streetsii Giesbeecht, Bull. Mus. Comp. Zool., vol. 25, no. 12, p, 249, 

 pi. 1, figs. 5-10, 1895. — Giesbrecht and Schmul, Das Tierreich, Lief. 6, 

 Copepoda, p. 34, 1898. 



Occurrence. — Two females from trawl wings, Station 1039, Fish 

 Hawk; 2 females in a vertical haul. Station 20045, Grampus, south 

 of Georges Bank. 



Distribution. — South of Iceland (With) ; northeastern Atlantic 

 (Farran) ; Malay Archipelago (A. Scott) ; South Atlantic, off 

 Africa (Cleve, Stebbing) ; California coast (Esterly) ; Gulf of 

 Maine (Bigelow). 



