COPEPODS GATHERED BY ALBATROSS—WILSON 329 
outside, a shorter terminal seta and a still shorter outer seta. Length 
2to2.4 mm. 
Male.—Metasome elliptical, a little more than twice as long as wide 
and scarcely narrowed at each end. Head fused with the first seg- 
ment and broadly rounded and without a crest; fourth and fifth 
segments also fused, the rounded posterior corners not quite reaching 
the genital segment. Urosome nearly half as long as the metasome 
and a fourth as wide, 5-segmented, the segments diminishing in length 
distally, the anal segment very short. Genital segment nearly as 
long as the first two abdominal segments combined and partially 
divided at its center. Caudal rami twice as long as wide and slightly 
divergent. 
First antennae reaching the center of the genital segment, rather 
stout at the base but rapidly becoming slender with short setae. 
Exopod of second antennae one-half longer than the endopod; mouth 
parts and first four pairs of legs like those of the female. Fifth legs 
similar to those of the affinis male but with the following differences: 
The endopod of the right leg is much shorter than the basal segment 
of the exopod and acuminate. The basal segment of the exopod is 
swollen proximally and produced inward at its tip into a blunt process, 
and the end segment is less than half as long as the middle segment. 
The rami of the left leg are approximately the same width, and the 
inner one is but little longer than the outer. 
Total length 1.82 mm. Metasome 1.20 mm. long, 0.53 mm. wide. 
Allotype male—U.S.N.M. No. 74151; station 5230, latitude 
10°01’50’" N., longitude 124°42’30’’ E., between Bohol and Leyte, 
Philippine Islands. 
Feemarks.—This species closely resembles ajfinis but is only three- 
fifths as large and has no frontal crest. These differences together 
with the details of the fifth legs in both sexes will identify the species. 
[Some question has arisen as to the actual identity of at least some of 
the specimens which Dr. Wilson has identified as S. medius, inasmuch 
as the drawing which he prepared of the fifth legs of the female for 
this report (pl. 34, fig. 516) is not in agreement with a manuscript 
sketch by Sars of an Albatross specimen for which he did not record 
the station number. Regrettably, the Albatross specimen figured by 
Wilson seems no longer to be extant. Dissections of a female S. medzus 
from the general collections of the National Museum (Albatross 
stations 5120, 5230) identified by Wilson, as well as a typical female 
so designated by him (Albatross station 5230), are unlike Wilson’s 
figure but do correspond closely with Sars’ sketch to which reference 
has been made. It cannot now be ascertained whether the Museum 
females identified by Wilson as S. medius are aberrant, or representa- 
