244 Memoirs of the Indian Museum. [Vol. V, 



expiratory channels, not very strong but continued to anterior margin. Buccal 

 cavern broader than long ; its lateral borders on either side defined by two conspicu- 

 ous ridges enclosing a deep trough. 



External maxillipedes large. Ischium and merus smooth, the former quadrate 

 with concave anterior (suturai) border. Merus about as long as broad, larger than 

 ischium; inner margin strongly curved, outer margin partially overlapping exopod, 

 anterior margin with a small process external to insertion of palp. 



Chelipedes equal in both sexes, much larger in the male than in the female. 

 Palm of chela in female sharply spinulose, fingers without teeth internally. Chela 

 of male swollen, for the most part smooth; inner margin of dactylus with one great 

 tooth at proximal end; tips of fingers not spooned. Walking legs short and stout, 

 meral segments somewhat dilated with large spinous tubercles arranged, as seen from 

 below, in a U _sna ped figure. Legs shaggy. 



Abdomen of male composed of six segments, the first four, though with distinct 

 sutures, apparently forming a single immovable piece. 



Type, — Leipocten sordidulum, sp. nov. 



The affinities of this genus are obscure. The complete character of the endo- 

 stomial ridges indicates a position in the section Hyperomerista and of the sub- 

 families that Alcock includes in this section it agrees more nearly with the Eriphiinae 

 than with any other. From the Eriphiinae it differs in the narrower front and 

 shorter postero-lateral borders, in the form of the outer maxillipedes, in the presence 

 of a double keel on either side of the buccal cavern and in the peculiar spinulation of 

 the walking legs. It clearly cannot be classed with any of the ' ' alliances ' ; ' of 

 Eriphiinae recognised by Alcock and is perhaps better regarded as the type of a 

 distinct subfamily. 



Leipocten sordidulum, sp. nov. 

 (Plate XII, fig. 9.) 



The carapace is subquadrilateral, broader than long in. the proportion of 19 or 20 

 to 15. The antero-lateral borders are subparallel, only a little divergent pos- 

 teriorly, and are nearly one and half times the length of the postero-lateral. The dor- 

 sal surface is slightly convex in both longitudinal and transverse directions — more so 

 in females than in males — and shows only the faintest traces of areolation. 



When the dense tomentum is removed, the surface is found to be finely pitted 

 and to bear small pearly grey tubercles, extremely variable in their number and dis- 

 position. In some female individuals they are more abundant than in the specimen 

 figured on plate xii, covering the entire surface, in others they are less numerous, 

 while in males they are frequently altogether absent except in the vicinity of the lateral 

 margin. Certain tubercles near the junction of the antero- and postero-lateral borders 

 and a few above the base of the last legs are, as a rule, larger and more conspicuous 

 than the rest. 



Even greater variation is shown in the structure of the antero-lateral border. In 



