932 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
its center. The caudal rami are as wide as long, each with five setae, 
the inner one much shorter than the others, which are about equal. 
The first antennae extend about three segments beyond the tips of 
the caudal rami and are sparsely setose. In the second antennae the 
exopod is a little longer than the endopod, and both are armed with 
very long setae. The mouth parts are similar to those of other species 
but more densely setose. The exopod of the first leg is 2-segmented, 
but the basal segment shows plainly that it is a fusion of two segments 
although it has but a single outer spine. The exopod of the second leg 
is 8-segmented, the endopod 2-segmented, and both rami of the third 
and fourth legs are 3-segmented. The basipod of the fourth leg carries 
a row of 15 aciculate spines on its posterior surface just inside the inner 
margin (fig. 246). These spines diminish in length from the inside 
outwardly in a manner similar to those of curvispinus. Total length 
3.85mm. Metasome 3.30 mm. long, 1.40 mm. wide. 
Male—The body of the male is considerably smaller than that of 
the female but has the same general proportions. The frontal horn 
is much reduced in size and cannot be seen at all in dorsal view, and the 
spines at the posterior corners of the metasome are practically in- 
visible except under magnification, whence the specific name. The 
exopod of the first leg is 3-segmented, the two basal segments being 
completely separated, but the first segment still lacks an outer spine. 
In the fifth legs the second basipod and the two proximal segments of 
the right exopod are considerably swollen. The terminal exopod 
segment is as long as the two basal segments combined and is strongly 
curved near its base. The right endopod is very short and reaches 
only to the center of the basal exopod segment. The middle segment 
of the left exopod is longer than either of the others, which are about 
equal, the end segment being bilobed at its tip. The left endopod is 
three-fourths as long as the first segment of the exopod and is acumi- 
nate. ‘Total length 3.25 mm. 
T'ypes.—U.S.N.M. No. 70402; station 4664, latitude 11°30’ S., longi- 
tude 87°19’ W., off Peru. 
Remarks.—This species resembles curvispinus in some details but 
differs widely in such details as the frontal horn and the spines at the 
posterior corners of the metasome. The fifth legs of the two males 
also differ in practically every essential detail. 
GAETANUS MILES Giesbrecht 
Gaectanus miles Girsprecut, Atti Accad. Lincei, Rome, ser. 4, vol. 4, sem. 2, p. 
335, 1888; Fauna und Flora des Golfes von Neapel, Monogr. 19, pp. 219, 224, 
pl. 14, figs. 21, 24, 25, 27, 30; pl. 36, figs. 1, 3, 1892. 
Stations 2; 5-7; 15; 16; 18; 56; 4638 ; 4648 ; 4679; 4681; 4687; 4689; 
4695; 4699; 4700; 4707 ; 4717; 4719; 4721-4723 ; 4730; 4734; 4740; 
