1898.] A. Alcock — Carcinological Fauna of India. 99 



" of carapace behind this punctate ; the rest of the surface almost quite 

 " smooth with three or four impressed lines in front. 



" Hands rugose, especially above; fingers, both movable and fixed, 

 " deeply channelled. 



" Pale yellowish red ; feet darker ; fingers pale horn-coloured. 



" Philippines." 



Our little specimen, from off Ceylon, 34 fms., agrees with this des- 

 cription; but the "impressed lines," which define the gastro-cardiac 

 region, are so faint as to be only just visible. 



It has the crested legs of Atergatis. 



Lophactea, A. Milne Edwards. 



Lophartea, A. Milne Edwards, Ann. Sci. Nafc. Zool. (4) XVIII. J 862, p. 43; and 

 Nouv. Archiv. du Mus. I. 1865, p. 245, and IX. 1873, p. 187. 

 Lophactipa, Miers, Challenger Brachyura, p. 113. 



" The Lophactasas are distinguished from Atergatis by their narrow- 

 er and always deeply lobulated carapace." 



Carapace moderately broad, convex in both directions, with the 

 regions generally well delimited and subdivided into lobes, and the 

 surface generally (not always) granular; the antero-lateral borders 

 have an independent crest-like edge, generally thin and sharp and dis- 

 tantly fissured ; the postero-lateral borders are rather concave. 



Front a little deflexed, about a fourth the greatest breadth of the 

 carapace in extent, grooved and emarginate in the middle line, but not 

 distinctly bilobed. Orbits large, the three suture lines near the outer 

 angle distinct. Eyes on short thick stalks. 



Antennules folding nearly transversely, inter-antennulary septum 

 broad. Basal joint of antennaa short, touching the front only : the 

 flagellum lodged in the orbital hiatus. Merus of the external maxil- 

 lipeds with the front edge a little oblique. 



Chelipeds equal in both sexes ; fingers not hollowed at tip. Long- 

 joints of legs with sharp crest-like upper borders much as in Atergatis, 



Abdomen of the male five-jointed, the 3rd-5th somites being 

 fused. 



Small crabs. 



Lophaetwa, except that the fingers are pointed instead of broad and 

 hollowed-out at tip, appears to me to be as closely as possible related to 

 Zozymus. In Lophactsea, besides the difference in the fingers, the cara- 

 pace is more convex and less cut up into lobules, and its surface is 

 generally granular. 



