322 Surg.-Capt. A. Alcock on 



antero-internal angle produced into a spine which is not 

 visible from above, and the second joint has both its anterior 

 angles produced into long sharp spines ; the flagellum is 

 about three times the length of the body. 



Of the external maxillipeds the ischium has its inner edge 

 finely, sharply, and very regularly toothed throughout, and 

 the meropodite has two large spines on its inner edge. 



The thoracic legs are comparatively short and stout. The 

 chelipeds when fully extended only just exceed the fully 

 extended body in length without the rostrum in the male, and 

 in the female only just equal the body without the rostrum, 

 and from the ischium outwards they are hairy and granular ; 

 the prismatic meropodite has the upper edge throughout and 

 the inner (lower) edge in its distal half spiny, and ends above 

 in two huge spines, the inner edge and the granular outer 

 edge ending in smaller spines ; the carpus has spines in two 

 rows on its upper and outer surface and two or three obliquely 

 placed spinules on its inner surface; the propodite in the 

 upper and outer surface of its palmar portion has three rows 

 of spines ; the fingers arc rather longer than the palm and 

 are closely and evenly toothed, the immobile finger having 

 usually a large spine near the middle of its outer edge and 

 terminating in a ])air of large spines, between which the tip 

 of the dactylopodite closes. 



Of the second, third, and fourth thoracic legs the upper 

 (anterior) edge is closely fringed with long hairs from the 

 base of the ischium to the tip of the claw ; in all the merus 

 and the carpus have the upper (anterior) edge strongly spined, 

 and the merus, propus, and dactylus have the posterior edge 

 serrate or spinulate. 



The branchial formula conforms to type. 



This subspecies has often been dredged in the Andaman 

 Sea, and appears to be gregarious. On the present occasion 

 several specimens of both sexes were dredged at Station 115, 

 188-220 fath. 



The largest male measures 54 millim. and the largest 

 female 56 millim. from the tip of the rostrum to the end of 

 the telson. 



Colours in life : cephalothoracic region and appendages 

 piidc, abdominal region white. 



The characters are quite constant throughout a large series 

 of individuals of both sexes. 



76. Munida s<2i(a7)wsa, Henderson, var. nov. proh'.va. 

 The length and the greatest breadth of the carapace are 

 nearly the same. The almost horizontal rostrum is one 



