Zoological Society. 223 



process; conical, trenchant, broad at the base, their outer edges 

 slightly elevated, with their points curving forwards. The first joint 

 of the external antennae is very large, long, cylindrical, and the an- 

 tennae are covered by the rostrum. The epistome is very nearly 

 similar to that of Acanthonyx. The chelae, shorter than in that genus, 

 are armed with flattened, conical, slightly obtuse spines. The second 

 joint triangular, with an external and internal conical spine, the ex- 

 ternal very long and directed upwards and forwards; the third ]o\xit 

 armed with three spines ; one superior posterior, and directed for- 

 wards ; two anterior lateral, and directed outwards and rounded at 

 their extremities ; the fourth joint is crested with a sharp flattened 

 spine. The legs are short, thick, veiy much compressed ; the third 

 joint has two large, flattened, conical spines on the front, directed 

 forwards ; the fourth joint has but one flat spinous process on its 

 anterior part, and the fifth joint enlarged and furnished posteriorly 

 with a sharp, flat, curved spine directed backwards. 



This beautiful genus is very apathetic when alive ; in that respect, 

 according to Mr. Adams's observations, resembling Lambrus. In 

 the system it is not far removed from Acanthonyx and Huenia. The 

 description is from a female. 



Zebrida Adamsii, White, List of Crust, in Brit. Mus. p. 124. 



In colour this species is of a light delicate pink, with dark liver- 

 coloured markings. There is a central line bifurcated anteriorly, 

 where it is lost on the inner bases of the horns of the rostrum, 

 and reaching posteriorly to the last joint of the abdomen, and having 

 external to it a fine, double, somewhat waved line. Extending from 

 the apex of the rostral spines, and meeting at the last abdominal 

 segment, are two broad lines, narrowed in the middle of the carapace ; 

 external to this is a fine double line, and on the outside of this is a 

 broad somewhat curved stripe, ending abruptly at the postero- 

 external angle of the carapace ; and at the base of the antero-lateral 

 spines is another rather broad linear mark, of the same dark liver- 

 colour. 



The third joint of all the legs has two broad, dark, red-brown 

 bands, directed somewhat diagonally across the joint ; the fourth and 

 fifth joints have one broad mark of the same colour. The under 

 surface is of a somewhat darker colour. On the outer part of the 

 abdominal segments is a round dark spot. The entire surface of the 

 animal is smooth, hairless, hard, polished and porcellanous. Eyes 

 black. 



A very distinct variety, from about twelve fathoms, in the Sooloo 

 Seas, had the carapace of a light green, with deep red-brown stripes, 

 and the legs and chelae of a pearly semi-opake white, and very 

 distinctly banded with deep red-brown. 



The specimen from which the foregoing description is taken was 

 dredged from a sandy bottom at about six fathoms water, near the 

 mouth of the Pantsi River, on the coast of Borneo. The descrip- 

 tion, it ought to have been remarked, was derived by Mr. Adams 



