552 Memoirs of the Indian Museum. [Voiv. V, 



different joints. In fig. ioo these have been partially separated so as to display 

 them more clearly. The basis has become very greatly broadened, more than half 

 as broad as long, this being mainly due to a flange on the outer side which appears 

 to be for the purpose of receiving and covering the more distal part of the limb when 

 bent back upon it. The ischium and merus are short and thick. The carpus has 

 become much more elongated, with its antero-basal angle more produced backwards ; 

 distally it narrows, the tooth on the posterior margin is much more developed and 

 projects out at an angle to the general plane of the carpus, while the postero-distal 

 tooth is very greatly elongated, being nearly as long as the propod and projecting 

 from the carpus at a different angle. The propod is narrowed, the tooth on its distal 

 margin very prominent, while the finger is greatly elongated and narrow ensiform in 

 shape, being much longer than the propod. The setules on the gnathopod are much 

 fewer and less conspicuous than in the more immature forms, the finger for example 

 bearing only a few on its concave surface. It will be seen from fig. ion, that this 

 fully developed gnathopod forms a very efficient grasping organ, the propod and 

 finger being capable of being bent back so that the finger reaches the merus. 



[Common at the edge of the lake under stones and also just above the bottom in 

 muddy water off shore. N. A.] 



Grandidicrella gilesi sp. nov. 



(Text-fig. ii.) 



Localities : — 



Off Samal Island, 8-15 ft. One male, two females. 



Off Satpara, 4-5 ft., i7-ix-i3. Five females. 



8 miles W. by S. of Breakfast Island. Two males, one female. 



Off north shore of Samal Island. Three females. 



Barkul Point. One male. 



Satpara Bay. One male and one female. 



Specific Diagnosis. 



In general shape of the body, antennae, peraeopods, etc. resembling G. megnae } 

 but differing markedly in the gnathopods. In the male the first gnathopod (fig. 11a) 

 is complexly subchelate, having the carpus greatly dilated ; the basal joint is broad 

 but not specially dilated, the ischium and merus are short, the latter bearing on its 

 hind margin a fringe of long plumose setae ; the carpus is very large, oval, but having 

 the postero-distal angle produced into a sharp tooth ; on the palm between this tooth 

 and the base of the propod is a triangular projection ; the hind margin of the carpus 

 bears a very distinct fringe of long plumose setae and there is another slightly oblique 

 row on the surface of the joint ; the propod is narrow at the base, widening slightly 

 distally and bears an oblique row of long plumose setae ; the finger is strong, slightly 

 curved and, with the propod, can be bent over to meet the distal tooth of the carpus. 

 The description of the first gnathopod just given applies to a moderately mature 

 male ; in older specimens (fig. no) the carpus is somewhat more developed, the 

 triangular process on its palm larger and irregular and the inner or posterior margin 



