1900.] A. Alcock — Carcinological Fauna of India. 451 



The two middle pairs of legs are much the largest : the first 

 pair, except that they are much shorter and slenderer, resemble the 

 middle pairs, but the fourth pair are weak, sometimes filiform, and are 

 elevated above the third pair as in Dorippe, etc. 



The abdomen in both sexes consists of 7 separate segments, the 

 basal segments being very narrow fore and aft and the 1st linear. 



In the female the genital openings are on the 2nd segment of the 

 sternum close to the suture between it and the first. 



Distribution : Atlantic coasts of Central America and of the United 

 States, Cape Verde and Mediterranean, Indo-Pacific from Seychelles to 

 California. 



The Indian species of Palicus live among coral shingle at a depth 

 of from 10 to 40 fathoms, where their mottled coloration and granular 

 rugose carapace afford a good concealment. 



Key to the Indian species of Palicus. 



I. Posterior border of the propodites and dactyli of the first 

 3 pairs of legs entire : — 



1. Front cut into two lobes : — 



i. Lobes of front broad : propodites and 

 dactyli of the two middle pairs of legs 

 snb-foliaceous P. Jukesii. 



ii. Lobes of front subacute : propodites and 

 dactyli of the two middle pairs of legs 

 compressed but not broadened P. Wliitei. 



2. Front cut into four lobes, the middle two sub- 

 acute, the outer ones broad P. Wood-Masoni. 



IT. Posterior border of the propodites and dactyli of the 

 first 3 pairs of legs elegantly serrate : — 



1. Front cut into four blunt teeth : propodites and 

 dactyli of the two middle pairs of legs broadly 

 foliaceous P. serripes. 



2. Front cut into four acute teeth : propodites and 

 dactyli of the two middle pairs of legs compressed 



but not foliaceous P. investigator is. 



131. Palicus Jukesii (White). 



Cymopolia Jukesii, White, in Jukes' Yoy, H. M. S. " Fly," p. 338, pi. ii. fig. 1 : 

 Miers Zool. H. M. S. "Erebus" and "Terror," Crust, p. 3, pi. iii. figs. 4-4c, and 

 Challenger Brachyura, p. 335 : Haswell, Cat. Austral. Crust, p. 138 : Henderson, 

 Trans. Linn. Soc, Zool., (2) V. 1893, p. 405. 



Carapace with the regions well defined, and with the surface 

 thrown into four transverse wrinkles, the two middle ones of which 

 are the most convex and best defined : the whole surface is also closely 



