446 A. Alcock — Carcinological Fauna of India. [No. 3, 



Naturwiss. LVI. 1883, p. 171 : Henderson, Trans. Linn. Soo., Zool., (2) V. 1893, 

 p. 380 : Nobili, Ann. Mus. Genov. (2) XX. 1899, p. 271. 



Gardisoma Guanhumi var. camifev, Ortmaun, Zool. Jahrb., Syst., VII. 1893-94, 

 p. 735. 



Cardisoma obesum, Dana, Proc. Ao. Nat. Sci. Philad. V. 1851, p. 252, and U. S. 

 Expl. Exp. Crust, pt. I. p. 375, pi. xxiv. fig. 1 : Milne Edwards, Ann. Sci. Nat., t.c. 

 p. 205 : Stimpson, Proc. Ac. Nat. Sci. Philad. 1858, p. 100 : Streets, Bull. U. S. Nat. 

 Mus. VII. 1877, p. 114: ? de Man, Notes Leyden Mus. II. 1880, p. 35. 



Gardisoma Urvillei, Milne Edwards, Ann. Sci. Nat. t.c. p. 204 : de Man, Notes 

 Leyden Mus. i.e., p. 33. 



Carapace strongly convex fore and aft, especially in the young, 

 the regions are indicated by inequalities of level, but the posterior 

 limit of the gastric region and the cardiaco-intestinal region are 

 denned by grooves : the posterior areola of the gastric region is always 

 tumid. 



The antero-lateral border of the carapace is defined by a fine raised 

 line, becoming indistinct with age, which is not continuous with the 

 small tooth at the outer orbital angle, but starts at a little denticle of 

 its own. 



The sides of the front (inner boundaries of the orbit) are very 

 oblique : the sinuous upper border of the orbit runs very slightly back- 

 ward to the base of the outer orbital tooth : the greatest width (height) 

 of the orbit is little more than half the length of that cavity. The 

 basal antenna-joint is large, touching the front. 



The breadth of the buccal cavern, measured across the middle of 

 the external maxillipeds, is equal to its length in the middle line. 



In both sexes the chelipeds are unequal : they are smooth, except 

 for a few small tubercles or wrinkles or denticles or granules along the 

 edges of some of the joints : the inner angle of the wrist is dentiform, 

 the palm is higher than long, especially in the larger hand, the stout 

 fingers meet only at tip, especially in the larger hand. 



The size of the larger cheliped varies with age. In adults of 

 moderate size it is about twice the length of the carapace, the ischium 

 hardly projects beyond the carapace, and the length of the dactylus is 

 about equal to the height of the palm. In old specimens, especially in 

 the male sex, it is about 2| times the length of the carapace, the 

 ischium projects far beyond the carapace, and the length of the dactylus 

 is 1J times the height of the palm. 



In the legs there are stiff bristles, not very thickly set, at the 

 distal end of the merus, on the anterior border and surface of the 

 carpus and on both borders of the propodite. 



The 7th segment of the male abdomen is half or less than half the 

 length of the 6th, measured in the middle line. 



