]899.] A. Alcock — Carcinological Fauna of India. 57 



upper surface, the palms are more swollen (in the adull:) and in the 

 smaller cheliped the fingers are decidedly longer than the palm : 



(6) the surface of tlie carapace and chelipeds is much moro 

 pubescent, and the size is much smaller. 



In the Indian Museum there are 6 specimens, from Mergui, Akyab, 

 and the Orissa coast : the carapace of the largest is 32 millim. long 

 and 48 millim. in extreme breadth. 



34. Charyhdis {Gonicsoma) callianassa (Herbst) A. M. Edw. 



? Cancer callianassa, Herbst, Krabben. III. ii. 45, pi, liv. fig. 7. 



Goniosoma callianassa, A. Milne Edwards, Archiv. da Mus. X. 1861, pp. 382, 385- 

 (part). 



Goniosomo variegatum. Miers, Zool. H. M. S. Alert p. 232 : Cano, Boll. Soc. Nat. 

 Napoli, III. 1889, p. 219: Thallvvdtz, Abh. Zool. Mus. Dresden, 1890-91, No. 3,. 

 p. 47 : Henderson, Trans. Linn. Soc , Zool., (2) V. 1893, p. 376. 



A small species, the carapace usually being about 23 millim. lono^ 

 and about 36 millim. in extreme breadth. 



Length of carapace about two-thirds the extreme breadtli (except 

 in the majority of adult females, in which the last spine of the antero- 

 lateral borders is much prolonged). 



Carapace decidedly convex, especially in its posterior half, covered 

 with short pile and crossed transversely by fairly well marked very 

 faintly granular ridges, which are disposed as in G. crucifera, except 

 that there is an additional one across the cardiac region. 



Front cut into six teeth {not including the inner supra-orbital 

 angles) of which the middle two are slightly the most prominent the 

 second on either side are broadish with a strong outward slope, and the 

 third on either side are the narrowest and most acute. 



Antero-lateral borders cut into six teeth (including the outer orbital 

 angle) of which the first is anteriorly notched with the inner ane-le 

 acute, and the last is spinelike and from IJ to twice (in many adult 

 females nearly three times) the length of the last but one : all the teeth 

 have their free edges fijially serrulate (except in the case of the posterior 

 edge of the last). 



The posterior border of the dorsal surface of the carapace forms a 

 curve with the postero- lateral borders. 



Orbits with a perceptible, but not strong, dorsal inclination : the 

 major diameter is a little more than a third the width of the interorbital 

 space : the inner angle of the lower border m dentiform, but the lobule- 

 at the outer end of this border is hardly distinguishable. 



There is a granular ridge, but no tooth, on the lobule at the outer 

 angle of the basal antenna-joint,. 

 J. II. 8 



