COPEPODS GATHERED BY ALBATROSS—WILSON 327 
fourth as wide as the metasome and caudal rami as wide aslong. The 
first antennae reach the genital segment, and neither of them is genic- 
ulate. The outer spines of the first and second segments of the second 
exopod are about equal, as in the female. The fifth legs are equal in 
length; the second basipod of the right leg is enlarged into a sphere 
almost four times the diameter of the first basipod. The endopod is 
styliform and 1-segmented, the exopod is slender and 3-segmented, 
and the endopod reaches only to the center of the first segment of the 
exopod. The two basipod segments of the left leg are slender and 
cylindrical and reach nearly to the center of the second segment of the 
right exopod. The two rami are 3-segmented and equal in length, the 
first two segments cylindrical, the end segment shaped like an hour- 
glass and sharply bent at the constriction. Total length 1.80 mm. 
Metasome 1.35 mm. long, 0.45 mm. wide. 
Allotype male.-—U.S.N.M. No. 74149; station 3799, latitude 29°22’ 
N., longitude 139°31’ W., Hawaiian Islands. 
Remarks.—The fifth legs of this Albatross male are as distinctive 
as those of the female and complete the species diagnosis. 
SCAPHOCALANUS INSOLITUS, new species 
PLATE 34, Firaures 512-514 
Stations 5105, 5231. Two females were found in the plankton at 
Station 5231, between Bohol and Leyte Islands in the Philippines. 
Additional specimens were taken also in the surface tow made at Sta- 
tion 5105 off southern Luzon. 
Female.—Metasome elongate-elliptical, nearly three times as long as 
wide and considerably narrowed at both ends. Head fused with the 
first segment and the resultant cephalothorax more than twice as long 
as the rest of the metasome, with a very pronounced triangular crest 
on the forehead. Fourth and fifth segments also fused and prolonged 
backward at the posterior corners nearly to the distal end of the genital 
segment. Urosome less than a third as long and a fourth as wide as 
the metasome and 4-segmented, the segments all about the same width. 
The genital segment is as long as the first abdominal segment, while 
the second and third abdominal segments diminish in length. Caudal 
rami as long as the anal segment, one-half longer than wide and 
divergent. 
First antennae reaching the caudal rami; exopod of the second pair 
slightly longer than the endopod, the second segment longer than the 
end segment and all the setae exceptionally long and slender. Fifth 
legs very unusual, as shown in figure 514, giving rise to the specific 
name. Each is 3-segmented, the two basal segments wider than long, 
the terminal segment much reduced in width and tipped with a small 
spine at each distal corner and two still smaller ones between them. 
