COPEPODS OF THE WOODS HOLE REGION 111 



tinged faintly with olive, and in the rami of the swimming legs, 

 which are colored like those of the female. 



Female. — Body slender, the greatest width about one-fifth of the 

 length; posterior corners of the fifth segment expanded into tri- 

 angular lamellae; genital segment abruptly contracted just behind 

 the center; anal segment longer than the genital segment and, with 

 the caudal rami, covered on the dorsal surface with scattered spines; 

 terminal spines on the fifth legs smooth, the inner ones two or three 

 times as long as the outer; penultimate segment with two stout 

 spines on the outer margin and a wide triangular spine at the inner 

 distal corner, all smooth. Total length, 1-1.25 mm. 



Mcde. — Posterior corners of fifth segment smoothly rounded; 

 urosome, including the caudal rami nearly as long as the metasome, 

 5-segmented; fifth legs each 4-segmented, the second (basipod) seg- 

 ment considerably swollen; end segment of right leg swollen at its 

 base, of left leg at its tip, where it ends in two or three knobs, each 

 armed with a spine. Total length, 0.9-1 mm. 



Remarks. — As can be seen above, this species is well distributed 

 among the brackish and fresh ponds of the area, in some of which it 

 was obtained in considerable abundance. It is readily distinguished 

 from the other species of the genus by the dorsal spines on the anal 

 segment and the caudal rami, and by the form of the fifth legs, 

 especially those of the male, in each of which the two distal seg- 

 ments are completely fused, 



EURYTEMORA AFFINIS (Poppe) 



Figure 74 



Temora afjinis Poppe, Abh. Nat. Ver. Bremen, vol. 7, pt. 1, p. 55, pi. 3, 1880. — 

 GiESBRECHT and ScHMEiL, Das Tierreich, Lief. G, Copepoda, p. 103, 1898. 



Occurrence. — Two females from a surface tow in Poucha Pond, 

 Chappaquiddick Island, July, 1926, 



Distribution. — Germany, Austria (Poppe) ; Sweden (Nordquist) ; 

 England, Scotland (Scourfield, Brady) ; Caspian Sea (De Guerne 

 and Richard) ; France (Richard, Canu) ; Gulf of St, Lawrence 

 (Giesbrecht) ; rivers and estuaries of Gulf of Mexico (Herrick) ; 

 Squam Pond, Nantucket Island (Pearse), 



Color. — Body transparent with an intensive admixture of violet, 

 blue, red, and yellow without definite arrangement. The basal seg- 

 ments of the legs, the mouth parts, the margins of the metasome 

 segments and the caudal rami show one or more of these colors. 

 Sometimes the first antennae are colored a dark blue as far as the 

 twelfth segment. Specimens obtained during summer show in- 

 ternally a large number of red oil drops. 



