“ 
NEPHROPSIS OCCIDENTALIS. 2 
the body bears a small but perfectly formed gill (arthrobranchia). Accord- 
ing to Spence Bate,* this gill is entirely wanting in W. deptodactyla. 
Dimensions of a female : length, 125.5 mm. ; length of carapace, 52 mm.; 
greatest breadth of carapace, 38 mm.; length of antennal scale, 5.5 mm. ; 
length of telson, 23 mm. 
Famity ASTACIDA, 
NEPHROPSIS Woop-Mason. 
Journ. Asiatic Soc. Bengal, Vol. XLII., Part IL., p. 40, 1873. 
Nephropsis occidentalis Fax. 
Plate DS Rigs Te 17. 
Bull. Mus. Comp. Zool., XXIV. 195, 1893. 
Carapace covered with a soft, furry pubescence ; branchial areas convex. 
Rostrum densely ciliated on the margins, armed with a pair of lateral teeth 
near the middle ; a double row of prominent granulations on the dorsal sur- 
face, diverging posteriorly and continued back for some distance on the 
gastric area, A small blunt papilla in the median line of the gastric area, a 
pair of acute teeth near the anterior margin at the base of the rostrum, and 
another pair on the anterior margin just above the insertion of the second 
pair of antennz. There are scattered granules on the gastric area and a 
- small papilla is seen in the median line on the intestinal region. A trace of 
an interrupted median carina is visible on the abdomen; it is most evident 
posteriorly. The abdominal terga are clothed with a soft fur like that on 
the carapace. The abdominal pleure are rather longer-pointed than in 
NV. stewarti, but not so much so as in W. agassizi and WN. atlantica ; their an- 
terior borders are finely denticulated, but destitute of spinous processes ; both 
anterior and posterior margins are furnished with long hairs. The sides of 
the pleurz of the sixth abdominal segment form a sharp right angle with one 
another, and the posterior angle is produced to a prominent, sharp spine. 
The telson is armed with a sharp spine in the median dorsal line, near the 
proximal end. The chelipeds are densely pubescent above ; in shape and 
armature they are similar to the other described species of the genus. 
The color of this species, as shown in a sketch from life by Mr. Wester- 
gren, reproduced on Plate D, is dusky olive-green on the dorsal surface, 
* Rep. Challenger Macrura, pp. 167, 168, 1888. 
