12 PROCEEDINGS OF THE NATIONAL MUSEUM voo. 82 



EURYTEMORA AFFINIS (Poppe) 



Plate 6, Figures 1-3, S 



Temora velox Lilljeboug, 1853, p. 77, pi. 19, figs. 9, 10, pi. 20, fig. 1. 



Teniora affinis 1'oppe, 1880, p. 55, pi. 3.— Hebkick, 1884, p. 133, pi. H, figs. 8-16. 



Temorella aff'mis Glaus, 1881, p. 491, pi. 2, figs. 8-14. — Herrick, 1887, p. 9, pi. 

 1, figs. 3-6, pi. 2, figs. 9-12.— Canu, 1888, p. 88, pi. 7, figs. 1-3. 



Temorella afflnis var. hlsinda Nordquist, 1888, p. 53, pi. 5, figs. 1, 6, 7, 10, pi. 

 6, figs. 4, 5. 



Eurytemora afjinis de, Guekne and Richard, 1889, p. 84, figs. 46, 47. — Richard. 

 1891, p. 247, figs. 13, 14.— Brady, 1891, p. 42, pi. 13, figs. 6-9.— Herrick 

 and TuRNEK, 1895, p. 51, pi. 1, figs. 5-10, pi. 60, figs. 8-15.— Schmeh., 1896, 

 p. 114, pi. 8, fig. 11, pi. 11, figs. 1-11. — GiESERECHT and Schmeil, 1898, p. 

 103.— Foster, 1904, p. 73.— Marsh, 1918, p. 756.— Rylov, 1922, p. 45, fig. 24, 

 a-d; 1930, p. 224, fig. 74, i-^.— Pesta, 1928, p. 47, fig. 39, A, .B.— Wilson. 

 1932," pp. Ill, 112, fig. 74. 



Eurytemora thompsoni Wiulby, 1923, p. 313, fig. 7. 



Last cephalothoracic segment expanded into two large pointed 

 wings extending distad and outward with nearly straight outer bor- 

 ders. (PI. 6, fig. 8.) The first abdominal segment projects on the 

 ventral side; it is expanded laterally for about one-half its length, 

 then narrowed suddenly. (PL 6, figs. 1, 3.) On the ventral side are 

 two triangular projections from the sides of the anterior part of the 

 segment, as shown in Plate 6, Figure 3. The second segment is very 

 short. The furcal rami are ciliate on their inner borders, and, in 

 the female, the dorsal surfaces of the furcae and of the last ab- 

 dominal segment are thickly beset with small spines. The rami, in 

 the female, are five to seven times as long as wide; in the male (pi. 

 6, fig. 2) the length is much greater. The first antennae vary in 

 length, sometimes nearly equaling the cephalothorax, but generally 

 being from two-thirds to three-fourths its length. 



The fifth foot of the female (pi. 6, fig. 8) has two spines on the 

 external border of the first segment of the exopod; the process of 

 the inner side of this segment is large, projecting inward and 

 slightly distally ; it is considerably longer than the second segment of 

 the exopod. 



The last two segments of the exopod of the right fifth foot of the 

 male are united and the proximal portion is swollen. The last seg- 

 ment of the left fifth foot is terminated by a rounded process and a 

 digitate projection. This is shown in Plate 6, Figure 6, of E. hirun- 

 doides. 



The length of the species, as given by various authors, evidently' 

 refers to the female and is about 1.5 mm. Measurements of Ameri- 

 can specimens were about the same, the females measuring 1.5 mm 

 or somewhat less, and the males 1 to 1.25 mm. 



^ References herein to Doctor Wilson's monograph on the copepods of the Woods Hole 

 region were added during the course of editing. — Editor. 



