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?fEPHROPSIS OCCIDENTALIS 



127 



the body bears a small but perfectly formed gill (arthrobranchia). Accord- 



ing to Spence Bate, 



* this gill is entirely wanting in W. 



Dimensions of a female : length, 125.5 mm. ; length of carapace, 52 mm. ■ 

 greatest breadtji of carapace, 38 mm. ; length of antennal scale, 5.5 mm. ; 

 length of tebori, 23 mm. 



Family ASTACID^. 

 NEPHROPSIS Wood-Mason. 



Journ. Asiatic Soc. Bcugal, Vol. XLIL, Part IL, p. 40, 1873 



Nephropsis occidentalis Fax. 



riale D., Fig. 1, T, 1\ 



Bull. Mus. Comp. ZooL, XXIV. 195, 1893. 



Carapace covered Avitli a soft, furry pube8cence ; branchial areas convex. 

 Eostrum densely ciliated on the margins, armed with a pair o[ 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 antennos. 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 tlie abdomen; it is most evident 

 posteriorly. Tlio abdominal terga are clothed with a soft fur like that on 



the carapace. The abdominal pleuroa are rather longer-pointed than m 

 N, dawarli, but not so much so as in iV". agassizii and N. allantica ; then- an- 

 teylov borders are finely denticulated, but destitute of spinous processes ; both 

 anterior and posterior margins are furnished with long hairs. The sides of 

 the pleura) 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 chellpeds are densely pubescent above ; in shape and 

 armature they are simihir 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, 



* llcp.*Cliall(Hig(u- Macnira, pp. 167, 168, 1888. 



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