84 



BULIaETIN" 15 8, UNITED STATES NATIONAL MUSEUM 



on the posterior surfaces of both rami ; each fifth leg a broadly oval 

 lamella, with two very unequal spines on the inner margin near the 

 tip, and a tiny rudiment of a spine on the outer margin near the 

 center. Total length, 1.25-1.5 mm. 



Mode. — Urosome almost half as long as metasome; anal segment 

 very short ; first antennae angularly curved near the middle, the prox- 

 imal segments with numerous aesthetasks ; fifth legs reaching beyond 



the caudal rami; left leg 4-segmented, 

 the second segment (basipod) consider- 

 ably enlarged, with a knoblike process 

 at the inner distal corner, which prob- 

 ably is a rudimentary endopod ; the end 

 segment is flattened and spatulate; two 

 basipods of the right leg are elongate 

 and cylindrical, exopod 3-segmented, 

 end segment bayonet-shaped, endopod 

 1-segmented, spiniform. Total length, 

 1. 2-1.4 mm. 



Remarks. — Sars designated this cope- 

 pod as a pelagic form, often found near 

 the surface, and these statements were 

 confirmed by With. It is probable, 

 therefore, that it will be found nearer 

 Woods Hole than the GraTn'pus station 

 cited above. Both sexes may be recog- 

 nized by the form of. the fifth legs; 

 Brady's Plate 16, Figure 16, labeled the fifth legs of the female, is 

 obviously a mistake, as it is not like Plate 18, Figure 1, and does not 

 represent the female fifth legs of this species. 



SCOLECITHRICELLA OVATA (Farran) 



FlGUKE 58 



Scolecithrix ovata Fabean, Rep. Fisheries Ireland, 1902-1903, pt. 2, p. 37, pi. 6, 



figs. 13-18. pi. 8, figs. 1-5, 1905. 

 Scolecithricella ovata With, Danish /«(7oZ/-Expeciition, vol. 3, pt. 4, Copepoda 1, 



p. 208, pi. 7, fig. 14, a^d, pi. 8, fig. 12, a-f, 1915. 



Occwrrence. — Twenty females captured in vertical hauls. Stations 

 10295, 20044, Grampus, south of Georges Bank. 



Distribution. — North Atlantic, off Ireland (Farran) ; Davis Strait, 

 Iceland, Denmark Strait (With); Gulf of Maine (Bigelow). 



Color. — The color of the living copepod has never been recorded. 



F empale. — Urosome less than one- fourth as long as metasome ; gen- 

 ital segment not protruding ventrally; first antennae reaching the 

 posterior margin of the genital segment; exopod of second antennae 

 one-third longer than endopod; fifth legs more or less distinctly 

 3-segmented and somewhat asymmetrical, the segmentation better 



a 



F I G o R B 57. — ScolecitJpricella 

 minor: a. Female, dorsal ; &, 

 male, fifth legs (after Sars) 



