1899.] A. Alcock — Carcinological Fauna of India. 63 



Carapace not very broad, its lerigtli about three-fourths its brcadtli, 

 little convex, smooth or granular in places when denuded of copious 

 short pile ; its anterior half only is crossed transversely by faint 

 granular lines disposed as in G. crucifera. 



Front cut into six acute teeth, not including the acutely dentiform 

 inner supra-orbital angles, of which the two middle ones hardly project 

 beyond the others and the outermost on eitlier side are tiie narrowest 

 and most acute. 



Antero-lateral borders very little oblique, cut into 6 acutely acumi- 

 nate teeth, of which the first (the outer orbital angle) is broad and 

 anteriorly notched with the inner angle acuminate, and the last is not 

 larger or more prominent than the others. 



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

 curve with the postero-lateral borders. 



Eyes large : the orbit has a considerable dorsal inclination and its 

 major diameter is nearly half the width of the interorbital space ; of the 

 two fissures in its roof the inner is a distinct gap ; the inner angle of 

 the lower border is acutely dentiform. 



The antero-external angle of the merus of the external raaxillipeds 

 is somewhat produced laterally. 



The chelipeds are long and, for a Goniosoma, are slender ; their 

 undersurface is finely granular (as also is a large part of the upper 

 surface of the arm) the granules of the hand showing a squamiform 

 arrangement. The arm has four large spines on the anterior border and 

 a spinule at the end of the lower border, but the posterior border is 

 unarmed. The hand is 6-costate, most of the costse being finely 

 granular, and has 4 acute spines on the upper surface. Fingers slender, 

 very acute, sharply toothed, longer than the palm, which is not swollen. 



The last pair of legs have the merus about two-thirds as long as 

 broad and are unarmed except for a spine on the posterior border of 

 the merus and two or three denticles near the far end of the posterior 

 border of the propodite. 



The 6th tergum of the male abdomen is much broader than long 

 and has curved and gradually converging sides. 



Colours in life red, the tips of spines light, chelipeds mottled red, 

 fingers banded dark and light red. 



In the Indian Museum are a male and egg-laden female from the 

 Gulf of Martaban, 53 and 67 fms. 



39. Charyhdis {Goniosoma) orientalis (Dana). 



? Charyhdis orientalis, Dana, Proc. Ac. Nat. Sci. Philad. 1852, p. 85, and U. S. 

 Expl. Exp. Crnst. pt. I. p. 285, pi. xvii. fig. 10. 



Goniosoma orientale, A. Milne Edwards, Archiv. du Mus. X. 1861, pp. 383, 385 ; 



