66 A. Alcock — Carcinological Fauna of India. [No. 1, 



Hughli and Coromandel coast and 1 from the Arakan coast — also 1 from 

 Hongkong and 1 from Java. 



41. Charyhdis { Goniohellenus) hopUtes, Wood-Mason. 



Goniosoma hoplites, Wood-Mason, Ann. Mag. Nat. Hist. (4) XIX. 1877, p. 422 : 

 Alcock and Anderson, J. A. S. B, Vol. LXIII. pfc. 2, 1894, p. 184, and III. Zool. 

 Investigator, Crust, pl. xxiii. fig. 6 : Alcock, Investigator Brachyura, p. 67. 



A small or smallish species. 



The length of the carapace is not mnch more than half the extreme 

 breadth measured between the tips of the last spine of the antero- 

 lateral borders. 



Carapace covered with a dense short tomentum, convex, the regions 

 well defined and fairly well areolated — the convexities of many of the 

 areolae granular. The gastric region is divided into three sub-regions, 

 the cardiac into two, and there is a very pronounced and independent 

 swelling on the inner part of either branchial region. 



A granular ridge crosses the middle of the gastric region trans- 

 versely, and a similar ridge — strongly arched forwards — crosses each 

 branchial region, beginning on the tip of the last epibranchial spine : 

 these are the only transverse ridges on the carapace, although it some- 

 times happens that two of the granular subregional convexities of the 

 anterior part of the gastric region are ridge-like. 



The front is exactly like that of G. ornata, except that the outer- 

 most pair of teeth on either side are rather sharper. 



The antero-lateral borders are cut into six teeth (including the 

 outer orbital angle) of which the last is a JVepiwwws-like spine at least 

 twice as long as those in front of it : the other 5 are square-cut lobules 

 separated by wide and deep notches, and having tjieir outer edge 

 serrate and their anterior angle acuminate. 



The posterior border of the dorsum of the carapace forms a strong 

 dog's-eared angle of junction with the postero-lateral borders. 



The orbits are exactly as in G. ornata, except that the inner 

 fissure of the roof is wider and the outer fissure less distinct. 



The chelipeds in typical specimens are exactly as in 0. ornata, 

 but it sometimes happens that the granulation of the arm does not 

 cover the whole surface of that joint. 



The last pair of legs are as in G. ornata, but the breadth of the 

 merus varies from half to two-thirds the length of that joint. 



The 6th tergum of the abdomen of the male is truncate-triangular, 

 having almost no curve to the sides. 



In the Indian Museum are 45 specimens from off the Coromandel 

 coast, from about 50 to about 1 10 fathoms, and 4 from off the Indus 

 Delta, 16 to 44 fms. 



