Garcinological Fauna of India. 317 



more than half-way along the pi'opodite of the 3rd pair— and have a 

 inach narrower merus. In all the le<?s the dactylus is stout and fluted 

 like a bayonet and has more or less of its anterior surface hairy : though 

 somewhat hiterally-compressed at base and gradually bi-oadening and 

 becoming dorso-venti ally- compressed towards the tip, ifc may faix"ly be 

 called styliform. The propodites of the first two paii'S of legs have 

 conspicuous brushes of hairs along their anterior surface. 



In the Indifin Museum are 84; specimens from all parts of the coasts 

 of the mainland and islands of India. Lnrge specimens have the 

 carapace 40 millim. long and about 45 millira. in greatest bx'eadth. 



Bistrihution : Indo-Pacific, from the east coast of Afiica to the 

 Sandwich Islands. 



In young specimens tlie surface of the appendages is smoother and 

 the eyestalks are not prolonged beyond the eyes, which are of large size. 

 In half-grown specimens the terminal style of the eyes is still short. 



44. Ocypoda macrocera, Edw. 



Ocj/j5orf« macrocera, Milne Edwai'ds, Hist. Xiit. Crust. II. 49: Kingsley, Proc. 

 Ac. Nat. Sci. Philad. 1880, p. 181 : Miers, Aun. Mag. Nat. Hist. (5) X. 1882, pp. 378, 

 381 : Obtmann, Zool. Jaheb., Syst., X. 1897-9S, pp. 360, 368. 



Closely related to 0. ceratophthahaa, from which it is distinguished 

 by the following characters : — 



(1) the carapace is rather broader and the orbits are a little more 

 oblique : 



(2) the raised marginal row of granules on the extei'nal maxillipeds 

 is less pronounced : 



(3) the fingers of the smaller cheliped are lamellar up to the tips, 

 which are broad and blunt, not pointed : 



(4) the stridulating ridge is less hairy and consists entirely of 

 striae. 



(5) it is a smaller species, large specimens having the carapace 31 

 millim. long and 37 millim. broad. 



In the Indian Museum are 78 specimens from the coasts of the 

 Bay of Bengal : tliere are none from the west coast or from an}' of the 

 islands, and the species appears to be confined to the Bay. 



The colour, in life, is bright red. This species lives in large 

 warrens in the sands of almost all parts of the east coast of the penin- 

 sula. One of its most active enemies is the Brahminy kite {Haliastur 

 Indus). One almost certain use of the striilulating-organ is to give 

 waiming to intending trespa.ssers, of its own species, that a burrow is 

 already occupied by its rightful owner. 



689 



