TO INDIAN CARCIXOLOGY. 387 



A comimrativcly small s|)ecies with tlu-eo epibranchial teeth as iii P. sinensis, but the 

 meropodites of the ambulatory legs unarmed. The largest specimen, a female, is 21-5 mm. 

 long and 27 mm. broad. 



Bistrihution. North India: Hurdwar, Puvneah, Allahabad, Jessore district {Wood- 

 Mason). 



Genus OcrpoDA, Fabr. 



140. OcrpODA CEILVT0PHTH.4XMA (Pallas). 



(>. ceratophthahna (Pallas), Miers, Aun. Mag. Nat. Hist. ser. o, vol. x. p. .379, pi. vvii. tig. 1 (1882). 

 Rameswaram and Tuticorin (Thnrston). Common on the South Indian coast 

 {J. I{. H.). 



The stridulating ridge on the inner surface of tlie hand is coarsely striated above, and 

 very finely striated below. 



Bistrihution. From the lied Sea, E. -\irica and Natal, to Japan and the Pacific 

 (Samoa, Fijis, Sandwich Is., etc.), also the coasts of Australia. 



141. OcYPODA MACROCEUA, Milne-Edw. 



O. macrocera (Milne-Edw.), Miers, Ann. Mag. Nat. Mist. ser. 5, vol. \. p. 381, pi. xvii. fig. 2 (1882). 



Rameswaram, many specimens ; Tuticorin, two males [Thurston) ; Madras, not 

 uncommon [J. R. 11.) . 



This species does not appear to be common. It differs from O. ceratophthahna in having 

 the finger-tips of both chelipedes, but especially of the smaller one, dilated and flattened. 

 The outer surface of both hands is also more finely granulated. The colour is a reddish 

 orange, most pronounced on the chelipedes. It occurs at Madras, above high-water 

 mark, but is much less common than the nest species. 



A Rameswaram specimen (female) has the carapace 30 mm. long and 38 mm. broad. 



Distribution . India [Mihie-JEdioards, Miers). 



142. OcTPODA PLATYTARsis, Milue-Kdw. 



O.pluti/tarsis (Milne-Edw.). Miers, Ann. Mag. Nat. Hist. ser. '>, vol. x. p. 383, pi. xvii. fig. 5 (1882). 



Rameswaram (Thurston) ; Ceylon {Haty) ; Madras, very abundant [J. li. 11.). 



The stridulatinir ridu'c is narrow and tuberculate in both sexes. The dactvli of the 

 ambulatory legs are broad and flattened in adults. This is the commonest species of 

 Ocypoda at Madras, where it occurs in great numbers, l)urrowiug in the sand near high 

 water mark, never at any great distance from the sea. It attains a large size, and a 

 male obtained by Mr. Thurston in Ceylon has the carapace* 5(5 mm. long and 06 mm. 

 broad. 



iJistrihution. India and Ceylon {Mitne-Edwurds, Jliers). 



143. Ocypoda corbimana, Desmarest. 



0. cordimana (Desm.), Miers, Ann. Mag. Nat. Hist. ser. o, vol. x. p. 387, pi. xvii. fig, 9 (188.2). 



