( 144 ) 



those of the antennules. Antennal acicle fused with the 2nd joint of the 

 peduncle. 



The exposed surfaces of the legs are punctate and rugulose. In the cheli- 

 peds the outer surface of the hands is beset with small vesiculous granules, 

 and on the upper part of the outer surface of the left hand there is a " stridu- 

 lating organ" formed by an oblique series of oblique up-standing laminar teeth, 

 which are in noway confused with the small vesiculous granules of the surface. 

 In the upper part of the inner surface of both palms there is a thick triangular 

 brush of long hairs, below which, on the left palm, is a strong longitudinal ridge. 



The 2nd legs equal, and the 3rd slightly surpass, the larger cheliped ; 

 their anterior and inferior edges are setose, though in the case of the third 

 left leg the setae are few and inconspicuous ; the dactyli are compressed, 

 triangular and scabrous. In the 3rd left leg the outer surface of the pro- 

 podite and dactylus is perfectly flat, smooth though punctate, and is separat- 

 ed from the anterior surface by a well-marked crest. On the concave under 

 surface of the dactyli of the 2nd and 3rd left legs there is a very fine longi- 

 tudinal ridge which can be played against the file of teeth on the upper 

 surface of the left cheliped. The coxae of the 5th pair of legs is produced 

 ventrally in both sexes, more so in the male than in the female and more so 

 in the case of the right coxa of the male than in the left. 



Colours in spirit : yellowish, usually a dark patch on the outer surface 

 of the left palm. 



This species, which is very common in the Andamans, where it swarms 

 on the dry beach and in the opener parts of the jungle just above the shore, 

 does not grow to a large size, individuals with a carapace 30 miliim. long 

 being very much rarer than those with a carapace from 12 to 20 miliim. in 

 length : the carapace of the largest egg-laden female in the Indian Museum 

 measures 24 miliim. 



560 Nicobars. J. Wood-Mason, 



8644 



— g— Andamans. G. M. J. Giles. (30). 



2445-49 



10 



Gt. Coco I., Andamans. A. Alcock, 



Andamans. A. R. S. Anderson. 



Mergui. " Investigator." 



S. India. Trevandrum Museum. 



822 Galle. J. Anderson. (10). 



1571 Betra Par, Laccadives. J. Armstrong. (3). 



[13. '• South Seas." Purchased.l 



[452. Samoa. Purchased.] 



