308 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
and a fourth as wide as the metasome, 4-segmented. Genital segment 
nearly as long as the first two abdominal segments combined and per- 
fectly symmetrical. Abdomen as wide as the genital segment, the anal 
segment longer than either of the first two segments and invaginate 
at the center of the posterior margin. Caudal rami as long as the anal 
segment, one-half longer than wide and slightly divergent, each with 
one outer and four terminal setae and an appendicular seta at the 
inner corner. 
First antennae stout at the base but quickly becoming slender and 
reaching the center of the second thoracic segment. Exopod of the 
second antenna only a third as long as the endopod, and its setae not 
reaching the distal end of the endopod. In the first four pairs of legs 
the exopods are all 3-segmented, the first endopod is a single segment 
without dividing grooves, but the setae give evidence that it is really 
three segments fused. The second, third, and fourth endopods are 2- 
segmented. The fifth legs are peculiar and furnish the chief charac- 
teristic that separates this from the other species of the genus. The 
exopod is stout and twice as long as the second basipod, with two small 
spines on the outer margin, a third at the tip, and a much larger one 
subterminal on the inner margin. The endopod is globular, less than 
one-fourth as long as the exopod, and this gives rise to the specific 
name. It is unlike the other species in that it is neither bifurcate nor 
pointed at the tip but is armed there with a stout spine curved out- 
ward. Total length 2.10 mm. Metasome 1.64 mm. long (midline), 
0.66 mm. wide. 
Types. —U.S.N.M. No. 74140; station 5223, latitude 13°36’ N., longi- 
tude 121°25’ 30” E., off Santa Cruz, Philippine Islands. 
Remarks.—The globular endopods of the fifth legs tipped with a 
stout curved spine and the perfect symmetry of the urosome are the 
best details for the identification of the species. 
PONTELLOPSIS LAMINATA, new species 
PLATE 31, Figures 470-475 
Station 5340. Forty specimens, females and two immature males, 
were taken at a depth of 17 to 22 fathoms at this station off Palawan 
Island in the Philippines. 
Female.—Metasome short and stout, nearly half as wide as long and 
broadly rounded anteriorly, with a central projection over the base of 
the rostrum. Fourth and fifth segments fused and squarely truncated 
posteriorly, with small spines at the corners, the left one slightly larger 
than the right. Urosome, including the caudal rami, half as long as 
the metasome and more than half as wide, and very asymmetrical. 
Genital segment increasing in width to its posterior margin, where 
it is as wide as long. First abdominal segment one-half wider than 
