36 A. Alcock — Carcinological Fmma of India. [No. 1, 



Front cut into four acute teeth (not counting the inner supra- 

 orbital angles) of which the middle two are the smaller and less pro- 

 minent and have projecting between them the dentiform process of the 

 epistome. Supra-orbital margin cut by two fissures into three lobes, 

 the outer angle of the middle lobe strongly dentiform. 



Atitero-lateral and posterior borders much as in the preceding 

 species except that the great lateral spines are only about 2J times the 

 length of any of the others. 



Eyes large, reniform, not concealed to dorsal view by the orbits, 

 which are large and almost entirely dorsal in position. 



Antero-external angle of merus of external maxillipeds very 

 strongly produced in a lateral direction. 



Chelipeds in the adult male a little over 2J times the length of the 

 carapace, somewhat shorter in the female — the hand the most massive 

 segment : granular in places, the granules on the upper surface of the 

 arm and under surface of the hand forming sub-squamiform lines. Arm 

 with 4 spines on the anterior (inner) border and 2 near the far end of 

 the posterior border. Wrist and hand costate, the costse granular. 

 Both inner and outer angle of wrist strongly spiniform, the former very 

 strongly so. Two spines on the hand, one being just in front of the 

 apex of the wrist-joint, the other being a short distance behind the 

 finger-joint : the carina that forms the outer boundary of the lower 

 surface of the hand is very salient. 



Legs, like the arm, tomentose in places, but very strongly so along 

 the anterior (inner) border : no spinule on the posterior border of the 

 carpopodites. 



The abdomen in the male has remarkably sinuous lateral borders : 

 the 2nd and 3rd abdominal terga in both sexes are very strongly 

 carinated. 



Colours in spirit yellow, often with some red markings on edges of 

 carapace and on fingers and on spines of chelipeds. 



A species of medium size, adult males having the carapace 

 about 33 millim. long and about 65 millim. broad including the great 

 ateral spines. 



In the Indian Museum are 13 specimens from Ceylon, Madras, 

 Sunderbunds, and Mergui, 



14. Neptunus (AmpTiitrite) argentatus (White) A. M. Edw. 



[*' Amphitrite argentata, White List. Crust. Brit. Mas. p. 126".] 



Neptunus argentatus, A. Milne Edwards, Archiv. du Mus. X. 1861, pp. 332, 339, 



pi. xxxi. fig. 4 : J. R. Henderson, Trans. Linn. Soc, Zool., (2) V. 1893, p. 368. 



Neptunus gladiator, var. argentatus, Miers, Challenger Brachyura, p. 177 : Cano, 



Boll. Soc. Nat. Napoli. III. 1889, p. 214 : Ortmann, Zool. Jahrb. Syst., VII, 1893- 



94, p. 73. 



