COPEPODS GATHERED BY ALBATROSS—-WILSON 279 
ventral view. Combined with the detailed armature at the tip of 
the left leg in the male they furnish the best characteristics for identi- 
fication. 
PAREUCHAETA EREBI Farran 
PLATE 14, F1cures 173-179 
Pareuchaeta erebi Farran, British Antarctic (Terra Nova) Exped., 1910, Zool., 
vol. 8, No. 3, p. 239, fig. 9, 1929. 
Stations 41; 2861; 3901; 4700; 5030; 5129; 5227. Fifteen specimens, 
including both sexes, were taken in a tow at a depth of 300 fathoms at 
station 5030 in the Okhotsk Sea. These Albatross specimens are 
smaller than those described by Farran and differ in one or two minor 
details, but they agree in all essential characteristics and include males 
as well as females. 
Female.—Metasome elliptical, a little more than a third as wide as 
long; head fused with the first segment and tapered to an acute point 
anteriorly. Fourth and fifth segments also fused, the posterior cor- 
ners reaching the genital segment each tipped with a short blunt spine. 
Urosome not quite half as long as the metasome, tapering a little pos- 
teriorly and 4-segmented. In lateral view the base of the ventral pro- 
tuberance of the genital segment extends the whole length of the 
segment, with the protuberance itself close to the anterior margin. At 
the tip the protuberance is flanked by a lamella on each side; the one 
on the right is larger than the one on the left and extends considerably 
farther posteriorly and ventrally, forming the projecting tip seen in 
side view. Between the bases of these two lamellae anteriorly is a 
third lamella, almost an exact trefoil in shape, and posteriorly is a 
roughened ridge. The first two abdominal segments are about equal 
in length; the anal segment is less than a fourth as long. The caudal 
rami are twice as long as wide, and the appendicular setae are weakly 
geniculate. 
The first antennae reach the anterior margin of the fourth thoracic 
segment and are rather sparsely setose. The exopod of the second 
antenna is much longer than the endopod, and the end segment is 
longer than the second segment. The exopod of the first leg is 2-seg- 
mented, the basal segment with a very concave outer margin armed 
with an aciculate spine at the center of the concavity and a large 
acuminate spine at the outer distal corner. The endopod is 1-seg- 
mented with five setae and does not reach the end of the basal segment 
ofthe exopod. Total length 7 to 7.50 mm. 
Male.—General body shape and proportions like those of the female 
but rostrum not so prominent and posterior corners of the metasome 
evenly rounded without spines. Urosome more than half as long as 
