COPEPODS OF THE WOODS HOLE REGION 55 



exopods 3-segmented, end segment of left one enlarged near the 

 tip and armed with stiff hairs and a spine. Total length, 3.01- 

 3.35 mm. 



Remarks. — This species is larger than the preceding one and 

 differs further in the size of the spines at the corners of the fifth seg- 

 ment and in the form of the fifth legs of the male. It also is boreal 

 and pelagic and seems to seek the colder water near the bottom. 



Genus EUCHIRELLA Giesbrecht, 1888 



Head usually separated from first segment, with or without a 

 crest; posterior corners of fifth segment rounded; urosome 4-seg- 

 mented in female, 5-segmented in male ; caudal rami about as wide as 

 long, each with a dense tuft of long fine hairs on the inner margin ; 

 exopod of first leg 2-segmented, of the three following pairs 3-seg- 

 mented ; endopod of first and second legs 1-segmented, of third and 

 fourth legs 3-segmented; basipod of fourth legs in female with 

 spines on inner margin and posterior surface; fifth legs lacking in 

 female, present and biramose in male. 



KEY TO THE SPECIES (BOTH SEIXES) 



1. Forehead without a crest 2 



Forehead with a crest 3 



2. Exopod of second antenna twice as long as endopod, or less- rostrata (p. 55) 

 Exopod of second antenna four times as long as endopod- messinensis (p. 56) 



3. Exopod of second antenna two and a half times as long as the 



endopod, or less pulchra (p. 58) 



Exopod of second antenna four times as long as endopod- curticauda (p. 59) 



EUCHIRELLA ROSTRATA (Clans) 



FiGUKE 35 



TJndina rostrata Claus, Die Copepodenfauna von Nizza, p. 11, pi. 1, fig. 2, 1866. 

 Euchirella rostrata Giesbrecht, Fauna und Flora des Golfes von Neapel, vol. 

 19, p. 232, pis. 2, 15, 1892. 



Occurrence. — Four males and females from trawl wings, Stations 

 2195, 2219, 2230, Albatross; two females in vertical haul. Station 

 10295, Grampus ; the former south of Nantucket. 



Distribution. — Mediterranean (Giesbrecht) ; California coast (Es- 

 terly) ; northern Atlantic (Cleve) ; Indian Ocean (Thompson) ; 

 Greenland, Iceland, Faroe Channel (With) ; southern Pacific 

 (Brady); Canary Islands (Cleve). 



Color. — Not very transparent; red pigment scattered through the 

 body, especially along the midline, on the posterior margins of the 

 thoracic segments, and in the genital segment. The long plumose 

 setae on the exopods of the second antennae are reddish yellow 

 and the same color is found in the basipods of the legs. 



