Garcinohgical Fauna of InHia. 843 



ii. Tympana ill defined: external maxilli- 

 peds of moderate size, the merus larger 

 than the ischium : the chelipeds of the 

 female, though not so stoat as those of 



the male, are stouter than the legs Tympanomkrus, L.'^I' 



2. The fintennules fold obliquely or quite trans- ' 



versely : no "tympana" are present on any 



of the joints of the legs (Macrophfhalminx) : — 



i. Merns of the external maxillipeds 



smaller than the ischium, the flagellum 



coarse Juid articulating at the antero- 



external angle of the moras : front 



deflexcd : oyestalks often very long ...... M.^ruopiiTrrAT.MUs. Jk 3"7 C 



ii. Merns of the external maxillipeds as ' 



Inrge ns or larger than the ischium, at 

 least the two terminal joints of the 

 flagellum are slender : eyestalks not 

 particularly long : — 

 a. Front declivous : carapace slightly 

 convex : the flagellum of the exter- 

 nal maxillipeds articulates at the 

 antero-external angle of the merns : 

 (the chelipeds of the female, as in 

 all Macrophflialmiiue, are shorter 



and slenderer than the legs) Cr.i.sTOSTOMA. \A "b I "i 



h. Front square-cut, not in the least I 



deflexed ; carapace quite flat dor- 

 sally : the flagellum of the external 

 maxillipeds articulates near, but 

 not at, the antero-external angle of 

 the mei'us : eyes not terminal on the 

 eyestalks Tyloihpi.ax. 



Subfamily Ocypodinj?, Dana. 



OcYPODA, Fabr. 



Ocypoda, Fabricius, Ent. Syst. Suppl. p. 347 : Desmarest, Consid. Gen. Crust, 

 p. 119, and Diet. Sci. Nat. XXVIII. p. 239 : De Haan, Faun. Japon. Crust, p. 29: 

 Milne Edwards, Hist. Nat. Crust. TI. 41, and Ann. Sci. Nat., Zool., (3) XVIII. 18.52 

 p. 141 : Dana, U. S. Expl. Exp, Crust, pb. I. p. 324: Kingsley, Proc. Ac. Nat. Sci. 

 Philad. 1880, p. 179 : Miers, Ann. Mag. Nat. Hist, (5) X. 1882, p. 37G, and Challenger 

 Brachynra, p. 237: Ortmann, Zool. Jahrb., Syst., X. 1897-98, p. 359 (72ei'j8iora <Zer 

 Oattung Ocypoda). 



Carapace deep, square or subquadrilateral, broader (but not much 

 broader) than long, moderately convex, strongly declivous anteriorly, 

 its dorsal surface closely granular witli the legions indistinctly and 

 incompletely defined. Front a narrow deflexed lobe, from a seventh to 

 an eighth the greatest breadth of the carapace. 



685 



