Indian Deep-sea Crustacea. 17 



Paralomis investigatoris, sp. n. 



This appears to be most nearly related to the Paralomis 

 aspera of Faxon, from off the Pacific coast of Panama. 



Carapace piriform, convex, slightly longer than broad ; 

 gastric, cardiac, and branchial regions well defined, tumid ; 

 the entire surface of the carapace, as of the second abdominal 

 segment, is closely covered with equal-sized papillifoim 

 tubercles, each of which is encircled by a crown of small stiff 

 hairs. 



Rostrum very distinctly and evenly trifid, the middle spine 

 with a few minute denticles at the proximal end of its ventral 

 border ; its sides and dorsal surface are spinate. 



Lateral margins of carapace, from the spiniform orbital 

 angle to the middle of the branchial regions, armed with 

 sharp curved spines. 



Eye-stalks dorsally spinulose. Antennulary peduncle 

 smooth. Antennal peduncle with the first two joints spini- 

 form at the outer angle and the third joint spiniform at the 

 inner angle, the flagellum longer than the carapace. 



The movable antennal acicle reaches nearly to the end of 

 the peduncle and ends very acutely ; its outer edge bears 

 at least three large spines and its inner edge three small 

 spines. 



Chelipeds and legs thickly spiny, especially on the dorsal 

 surfaces. The right cheliped is very slightly stouter than 

 the left, which is not stouter than the legs; but the right 

 legs are not longer than the left. The legs all end in a little 

 black claw and are hardly half a dactylus longer than the 

 chelipeds ; they are about 1| times the length of the 

 carapace. 



The second abdominal segment bears a single dorsal plate, 

 which is rather deeply dimpled on either side of the middle 

 line. 



The abdomen of the male is quite straight and practically 

 symmetrical ; in the female it is not quite symmetrical and 

 is slightly twisted to the right. 



Four specimens, the largest of which has the carapace 

 33 millim. long and 29'5 millim. broad, from off the Travan- 

 core coast, 430 fathoms. 



Colours in spirit orange, eyes intensely black. 



These are the first representatives of the genus Paralomis 

 ever taken in Indian seas. A closely allied form — Lithodes 

 Agassizii — was, however, taken in 1896 close to the spot 

 where these two species of Paralomis were dredged last year. 



Ann. & Mag. N. Hist. Ser. 7. Vol. iii. 2 



