290 A. Alcock—C arcinological Fauna of India. [No. 3, 



Family PALICIDiE (vel Cymopolid^e). 



This little and aberrant family is probably best treated as an 

 appendage to the Grapsidse. 



Family OCYPODIDiE, Ortmann (pt.). 



Ocypodiens, Milne Edwards, Hist. Nat. Crust. II. p. 39. 



Ocypodinse, Milne Edwards, Ann. Sci. Nat. Zool. (3) XVIII. 1852, p. 140, plus 

 Oonoplaces Vigils (pt.), p. 155. 



Macrophthalmidte, Dana, U. S. Expl. Exp. Crust, pt. I. pp. 308, 312. 



Ocypodinse, Miers (pt.), Challenger Brachyura, p. 236, and Myctirinse (pt.), p. 275. 



Ocypodidse, Ortmann (pt.), Zool. Jahrb., Syst., VII. 1893-94, pp. 700, 741; and 

 in Bronn's Thier Reich, torn, cit., p. 1179. 



In the treatment of this family nothing can be added to the scheme 

 of Dana, where they are divided into 3 sub-families as follows : — 



Subfamily I. Ocypodinse (Ocypodiaces Ordinaires Edw., Ocypodinse 

 Dana (pt.), Miers (pt.), Ortmann). Carapace deep, subquadrilateral, 

 the regions seldom well defined : front narrow deflexed, commonly a 

 mere lobe between the long eyestalks : antennular flagellum small, 

 folding obliquely or almost vertically, the interantennular septum 

 broad : the external maxillipeds completely close the buccal cavern, 

 their exognath is inconspicuous but is not, or not entirely, concealed, and 

 may either have, or be destitute of, a flagellum : chelipeds remarkably 

 unequal either in both sexes or in the male only. There is an orifice or 

 recess, the edge of ivhich is thicltly fringed zuith hair, between the bases of 

 the 2nd and 3rd pairs of true legs, 



Subfamily IT. ScopiMERiNiE (Ocypodiaces Globulaires Edw., Dotivse 

 Dana, Myctirinse (pt.) Miers, Ortmann). Carapace very deep, cuboidal 

 or globose : front narrow deflexed, commonly a mere lobe : antennular 

 flagellum rudimentary, folding nearly vertically and hidden beneath 

 the front, interantennular septum broad : buccal cavity large, sometimes 

 enormous, completely closed by the external maxillipeds which are 

 commonly very prominent and have small linear concealed exognaths 

 with or without a flagellum : chelipeds equal or subequal in both sexes. 

 Orbits shallow. Curious membranous spaces known us " tympana " exist 

 on the meropodites of the legs and often of the chelipeds also ; and some- 

 times on some of the segments of the sternum. No hairy recesses between 

 the bases of the 2nd and 3rd pairs of true legs. 



Subfamily III. Macrophthalminje. (Gonoplaces Vigils pt. Edw., 

 Macroplithalminse Dana, Miers, Ortmann). Carapace usually quadri- 

 lateral, broader than long (sometimes more than twice as broad as long), 



