292 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
two localities where it has been found are so close together suggests that 
it is very limited in its distribution. As can be seen in the figure the 
fifth legs of the female have more spines than usual upon the exopods, 
while the endopods are conical and unarmed. In the right leg of the 
male the thumb is long and slender, while the movable finger is stout, 
enlarged both at its tip and at its base and between the two enlarge- 
ments is very sharply bent. The hand of the chela has a single 
projection on its inner margin tipped with a short spine. 
PONTELLA DANAE Giesbrecht 
PLATE 16, Fiaures 195-197 
Pontella danae GIESBRECHT, Atti Accad. Lincei, Rome, ser. 4, vol. 5, sem. 2, p. 28, 
1889 ; Fauna und Flora des Golfes von Neapel, monogr. 19, pp. 461, 477, pl. 24, 
figs. 32, 33, 35, 40; pl. 40, figs. 16, 20, 1892. 
Stations 9; 27; 80; 31; 236; 3412; 8683; 3912; 4592; 4611; 4615; 
4619; 4635; 4640; 4650; 4659; 4685; 4714; 4716; 4741; 4952; 5319; 
H. 8786. Identified by Sars from 15 of these Albatross stations; not 
found in the Monaco plankton; present at only a single station in the 
Siboga plankton and at two stations in the Carnegie plankton. It can 
be easily recognized by the great dissimilarity in the caudal rami, the 
right one being four times as large as the left. 
PONTELLA DENTICAUDA A. Scott 
Pontella denticauda A. Scort, Copepoda of the Siboga-Expedition, monogr. 29a, 
pt. 1, p. 161, pl. 52, figs. 1-12, 1909. 
A single female was found at Caldera Bay anchorage, west coast of 
Mindanao, Philippine Islands. Scott had 50 specimens, including both 
sexes, from the tropical Pacific a little south of the Philippines. Not 
found in any of the other plankton lists. 
PONTELLA DIAGONALIS, new species 
PLATE 28, Figures 410-413 
Station 5553. A single female was captured at the surface at this 
station off Jolo Island in the Philippines. 
Female.—Metasome elliptical, two and a half times as long as wide; 
base of the rostrum projecting as a rounded knob from the center of 
the forehead ; lateral hooks stout and strongly curved. Posterior end 
of metasome squarely truncated, with a large triangular spine at each 
corner. These spines are symmetrical, with a wide flange on the inside 
at the base, are acutely pointed, and reach to the posterior margin of 
the genital segment. The fifth segment is very short and imperfectly 
separated from the fourth. On the midline of the dorsal surface is a 
longitudinal row of dark circular spots, one at the posterior margin of 
each of the first four thoracic segments. The anterior one is the 
