COPEPODS GATHERED BY ALBATROSS—WILSON 311 
urosome like that shown in figure 496’. The distal corner of the 
genital segment on the right side was prolonged diagonally outward 
and backward into a slender finger process, while the left side was 
smoothly rounded. Otherwise this specimen was just like all the 
others, and its fifth legs proved it to be regalis. 
PONTELLOPSIS SINUATA, new species 
PLATE 33, Fiaures 497-502 
Stations 2937; 5223. Nine females and a male were obtained from 
a surface tow at the first of these stations, the type locality, off the 
coast of southern California. Additional specimens were taken off 
Santa Cruz, Philippine Islands, station 5223. 
Female.—Metasome elliptical, a little more than twice as long as 
wide; head broadly rounded in front, with a slight median projection 
over the base of the rostrum. Fourth and fifth segments fused, with 
triangular spines at the posterior corners pointed diagonally outward 
and backward and reaching the distal margin of the genital segment. 
Urosome one-third as long as the metasome, 3-segmented, and con- 
siderably distorted. Genital segment bent to the right at its distal 
end and downward; the two abdominal segments partially fused, as 
wide as the genital segment, and bent first downward and then upward 
at the tip, giving the urosome an S-curve when viewed laterally, whence 
the specific name. There is a ventral protuberance at the center of 
the genital segment tipped with a short process, and the dorsal sur- 
face of the first abdominal segment is prolonged backward over the 
anal segment and projects as a rounded tongue between the caudal 
rami. The latter are nearly as wide as long, the left one larger than, 
the right and each with five setae, the outer one at the center of the 
outer surface. 
The first antennae are short and slender, just reaching the third 
thoracic segment. The exopod of the second antenna is much shorter 
than the endopod, and its terminal setae scarcely reach the tip of the 
latter. The exopod of the fifth legs is twice as long as the endopod 
and curved inward, with two small spines on its outer margin. The 
tip is bifurcate for a short distance, with blunt branches, and farther 
down on the inner margin is a large spine of varying size but usually 
larger than the tip. The endopod is bifurcate for half its length, the 
branches slender and blunt. Total length 4.24 mm. Metasome 3.50 
mm. long, 1.50 mm. wide. 
Male.——Metasome a little smaller and narrower than in the female, 
almost three times as long as wide if the posterior spines are included. 
Head separated from the first segment, and the fourth segment from 
the fifth, the latter with spines at the posterior corners much longer 
than in the female, reaching the anal segment. Urosome cylindrical 
