COPEPODS OF THE WOODS HOLE EEGIGN" 



109 



4. Third (first exopod) segment of right fifth leg much longer than 

 fourth and fifth segments combined ; second segment of left leg 



without spines herdmani (p. 112) 



Third (first exopod) segment of right fifth leg no longer than 

 fourth and fifth segments combined ; second segment of left 

 leg with 2 outer spines affinis (p. Ill) 



EURYTEMORA AMERICANA Williams 



Figure 72 



Eurytemoni americana Williams, Amer. Nat., vol. 40, p. 645, figs. S-"!!, 1906. 



Oocii/rrence. — A dozen males in surface tow at Menemsha Bight, 

 Marthas Vineyard, August, 1926. 



Distrihution. — Narragansett Bay (Williams). 



Color . — B o d y 

 transparent and col- 

 orless, the anal seg- 

 ment and caudal 

 rami appearing dark 

 colored on account 

 of the spines cover- 

 ing their dorsal sur- 

 face; eye ruby red; 

 eggs light green. 



Femals. — Poste- 

 rior angles of fifth 

 segment armed with 

 sharp spines di- 

 r e c t e d diagonally 

 outward and back- 

 ward ; urosome, in- 

 cluding the caudal 

 rami, three-fifths as 

 long as metasome ; 

 genital segment 

 evenly rounded laterally and clorsally, but protruding ventrally; 

 caudal rami as long as urosome, eight times as long as wide, 

 and together with the anal segment covered with small spines ; basal 

 segments of fifth legs completely fused, leaving three free segments 

 in each leg; end segment tipped with two very long and slender 

 plumose setae; inner spine of penultimate segment long, acuminate, 

 dentate distally; inner margins of these two segments fringed with 

 tufts of long hairs. Total length, 1.6-1.85 mm. 



Mole. — Posterior angles of fifth segment smoothly rounded, no 

 spines; urosome 5-segmented, anal segment and caudal rami without 

 71937—32 9 



a •% 



Figure 72. — Eurptomora americana: a. Female, dorsal ; 

 h, female, fifth legs ; c, male, fifth legs 



