1896.] A. Alcock — Carcinological Fauna of India. 189 



On the carapace are three broad granular ribs which unite to form 

 a " broad-arrow," point forwards : the middle ridge begins about the 

 middle of the gasti'ic and ends in the middle of the intestinal region, 

 the lateral ribs run obliquely backwards and outwards, parallel with the 

 antero-lateral mai'gins, across the branchial regions, their ends projecting 

 well beyond the postero-lateral borders in the male, but not so much in 

 the female. 



The chelipeds are about half again as long as the carapace : the 

 arm is trigonal with the edges raised and granular : the wrist and hand 

 have a raised row of granules along the inner edge of their upper 

 surface : the hand is about two-thirds as broad as long, and the fingers 

 are about two-thirds the length of the hand. 



The abdomen of the male consists of only two pieces, and is with- 

 out a denticle. 



Colours in spirit : mottled dark green and greenish brown, legs 

 and chelipeds with black-speckled cross-bands. 



Length of carapace of male 5 millim. long, 45 millim. broad ; of 

 ovigerous female 6 millim. long, 5"75 millim. broad. 



Loc. Karachi. 



As in Ebalia erosa the space between the lower edge of the orbit 

 and the edge of the buccal frame is mucli reduced. This species appears 

 to be closely related to Ebalia hypsilon, Ortmann, in Semon's Zool. 

 Forschungreisen Austral, u. Malay. Arch., Crust, p. 36, pi. ii. fig. 7. 



32. Ebalia erosa, (A. Milne Edwards). 



Phlyxia erosa, A. Milne Edwards, Journ. Mus. Godeff. I. iv. 1873, p. 262, and 

 Nouv. Archiv. da Mus. X. p. 47, pi. iii. fig. 2 : Haswell, P. L. S. N. S. Wales, IV. 

 1879, p. 54, and Cat. Austral. Crust, p. 125 : Miers, P. Z. S. 1884, pp. 10, 13. 



Ebalia erosa, Miers, ' Challenger ' Brachyura p. 305 : Ortmann, Zool. Jahrbuch. 

 Syst., etc., VI. 1892, p. 580. 



Carapace longer than broad, somewhat piriform, with a produced 

 narrow bidentate front from which a prominent ridge runs straight 

 back to the cardiac region, with the hepatic and subhepatic regions 

 angularly prominent, and with- three dentiform projections — one of 

 which is the acuminate tip of the tumid intestinal region — on the 

 prominent posterior margin. On the posterior half of the carapace 

 there are some large symmetrically disposed tubercles, usually about 

 9 in number (3 on either branchial region and 3 on the cardiac region) 

 and sometimes more or less confluent : the three on the cardiac region 

 are always very distinct and are so connected as to form an elegant V, 

 or with the ridge from the front an " anchor," and however much the 

 branchial tubercles may be confluent one on either side of the V is 



