■ Carcinological Fauna of India. 3(jl 



Carapace stiougly convex fore and aft, the regions moderately well 

 defined : its lateral bordeis are strongly convergent, and still more so 

 are the lateral borders of the dorsal plane, which are defined in more 

 tlian two-thirds of their extent by a fine raised line : the posterior 

 border of the dorsal plane is contained fiom 2h to 2a times iu the 

 geatest breadth. 



Front, measured between the eye-stalks, about a twelfth the 

 greatest breadth of the carapace, its moulded and bevelled edges do not 

 together take up half its breadth. 



Orbits moderately oblique, botii upper and lower borders much 

 siuuous ; the lower border finely, the upper border still more finely and 

 more distantly creuulate. 



In the large cheliped of the adult male all three borders of the arm 

 are well defined, the inner and the lower borders being creiiulated, but 

 the ia-ner border having no tooth independent of the terminal coustricted- 

 off lobule ; the upper surface of the wrist and the outer sui'face of the 

 palm are closely covered with vesiculous granules; and tlie hand 

 (fingers included) may be 3^ times the length of the carapace. 



In this large hand the upper and lower borders of the palm are 

 well defined, and of the two oblique granular crests on the inner surface 

 of the palm the upper one that runs to the dentaiy edge of the immobile 

 finger is short and indistinct : the fingers are not particularly broad or 

 thin, and however the teeth may be disposed, there is always one near 

 the end of each finger that is enlarged so as to give the ends of the 

 fingers, when apposed, a sort of tongs-like or forceps-like grip : the 

 dactylus is from 2 to nearly 2f times the length of the upper border of 

 the palm. 



The merus of the last pair of legs is distinctly foliaceous. 



In the Indian Museum are 92 specimens chiefly from the Sunder- 

 buuds and Mergui, but also from Karachi and the Andanians. In a 

 lai'ge specimen the carapace is 14 millim. long and 25 broad. 



56. Gelasimus Vnssumien, Edw. 



Gelasimus D'xssumieri, Milne Edwards, Ann. Sci. Nat. Zool. (3) XVIII. 1852, p. 148, 

 pi. iv. fig. 12: A. Milne Edwards, Nonv. Arcliiv. du Mus. IV, 1868, p. 71, and IX. 

 1873, p. 274: Hoffmann in Pollen and van Dam's Faun. Madag. Crust, p. ]7> pi. iii. 

 figs. 19-22: Kingsley, Proc. Ac. Nat. Sci. Philad. 1880, p. 145, pi. x. fig. 16: de 

 Man, Notes Leyden Mus. II. 1880, p. 68, and Xlll. 1891, pp. 20, 26, and Jonrn. Linn. 

 Soc. Zool. XXII. 1887-88, p. 108, pi. vii. figs. 2-7, and in Weber's Zool. Ergebn. 

 Niederl. Ost-Ind. II. 1892, p. 306, and Zool. Jabrb., Syst., VlII. 1894-95, p. 576: 

 Lenz and Ricbters, Abb. Senck. Kat. Ges. Frankf. XII. 1881, p. 423 : Haswell, Cat. 

 Austral. Crust, p. 93 : Miers, Zool. H. M. S. Alerl, pp. 518, 5'11 : Ortmann, Zool. 

 Jabrb. Syst. VII. 1893-94, pp. 750, 755. 



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