336 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
Genus SCOLECOCALANUS Farran, 1936 
SCOLECOCALANUS SPINIFER, new species 
PLATE 35, FieurES 528-531 
Station 5321. Farran (1936, p. 102) estabished the genus Scoleco- 
calanus for two species, S. galeatus and S. lobatus, taken during the 
British Expedition to the Great Barrier Reef of Australia. Both of 
the species were founded upon females alone and have never been 
recorded by any other author. Two females and a male of this new 
species were taken at this station between Formosa and Luzén in a 
vertical haul from the bottom at 26 fathoms to the surface. 
Female.—Metasome elliptical, two and a half times as long as wide; 
head fused with the first segment to form a cephalothorax longer than 
the rest of the metasome. Forehead armed with a high galeate crest, 
which extends back on to the dorsal surface of the head. Fourth and 
fifth segments partially fused, with the posterior corners extending 
back beyond the center of the genital segment, and the posterior 
margin deeply reentrant on the dorsal surface. The urosome is 4- 
segmented, the segments diminishing considerably in length but only 
a little in width posteriorly. The genital segment is asymmetrical, 
being produced outward and backward on the right side, the right 
posterior corner ending in an acute spine, which extends back over the 
first abdominal segment and nearly reaches its posterior margin, and 
is prominent in both dorsal and lateral views. The anal segment is 
very short and reentrant at the center of its posterior margin. The 
caudal rami are wider than long, somewhat divergent, and on a level 
with the ventral surface of the anal segment, each with five terminal 
setae. 
The first antennae are rather slender and reach beyond the tips of 
the caudal rami by two segments. The exopod of the second antenna 
is one-half longer than the endopod, and the end segment is longer 
than the second segment. The second maxilla has five lateral lobes, 
with very long setae and three short terminal segments. The maxil- 
liped is 7-segmented and tapers regularly from base to tip and is 
sparsely setose. The first four pairs of legs have 3-segmented exopods 
and endopods with 1, 2, 8, and 3 segments, respectively. Only the 
left fifth foot is present as in Farran’s two species; the basal segment 
has a small finger process at the distal end on the anterior surface, and 
the long curved terminal spine is without a trace of spinules or hairs 
on either margin. Total length 4.38 mm. Metasome 3.80 mm. long, 
1.53 mm. wide. 
Male.—Metasome with the same general structure as in the female, 
but the frontal crest is a little longer and extends farther back on the 
