300 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
segment two, and the third segment five. The outer spine on the 
second exopod segment is considerably enlarged. The fifth legs are 
not quite symmetrical, the left one a little larger than the right. The 
exopods are three times as long as the endopods, curved inward, and 
each has a small spine at the center of the outer margin. The endopod 
is very small, its distal third bifurcate with the branches acutely 
pointed. Total length, including caudal rami, 3.60 mm. Metasome 
38 mm. long, 1.20 mm. wide. 
Male—Metasome more slender than in the female, almost three 
times as long as wide, and narrowed considerably posteriorly, a small 
protuberance at the left posterior corner but only the rudiments of 
one at the right corner. Urosome symmetrical, a third as long as 
the metasome if the caudal rami are included and a fifth as wide, 
5-segmented, the anal segment very short. Caudal rami as long as the 
last three abdominal segments combined and curved lke parenthesis 
marks, 
First antennae as short as in the female, the right one geniculate; 
second antenna, mouth parts, and first four pairs of legs like those 
of the female. The fifth legs are very simple and of small size; 
the movable finger of the chela on the right leg is slender, nearly 
straight, and armed on its inner margin with two small setae. The 
hand is also slender and unarmed, while the thumb is rodlike, attached 
to the very base of the hand and curved inward. The last segment 
of the left leg is pointed and covered with hairs. Total length, includ- 
ing caudal rami, 3.40 mm. Metasome 2.67 mm. long. 
Types.—U.S.N.M. No. 74184; Romblon Island, Philippine Islands. 
Remarks.—This species is easily recognized by the large dorsal 
upturn of the posterior end of the genital segment and the asymmetry 
of the posterior corners of the metasome. The upturn has given rise 
to the specific name, and the extension of the musculature to its very 
tip shows it to be an intrinsic part of the segment itself and not an 
extrinsic growth. 
PONTELLA TENUIREMIS Giesbrecht 
PLATE 17, Figures 215-219; Puate 29, Ficure 431 
Pontella tenuiremis GiesBrecHT, Atti Accad. Lincei, Rome, ser. 4, vol. 5, sem. 2, 
p. 28, 1889; Fauna und Flora des Golfes von Neapel, monogr. 19, pp. 462, 
477, pl. 24, figs. 6, 24-26; pl. 40, figs. 3, 4, 7, 37, 1892. 
Stations 15; 3822; 3878; 8898; 4010; 4011; 4642; 4669; 4683; 4685; 
4696; 4700; 4785; 4738; 5415; Ellice Islands; Beaver Harbor, Van- 
couver Island, British Columbia. Established by Giesbrecht upon 
specimens taken in the tropical Pacific; subsequently reported by 
Thompson and Scott (1903, p. 252) from Ceylon; and found well 
distributed in the Pacific by the Carnegie. Dana wrongly assigned 
