67 



The chelipeds are a little, but not very remarkably, unequal : the larger one 

 is about 2^ times the length of the carapace. Their surface is smooth and 

 polished. The arm, the whole of which is visible beyond the carapace, has much 

 the same shape as in Trapezia, but its anterior border, though serrated, is not 

 expanded ; the lower border of the hand is sharp and somewhat dilated poster- 

 iorly, as in Trapezia : the inner angle of the wrist is rounded, but sometimes 

 carries a small spinule. 



The legs are slender smooth and poHshed, and have a few hairs distally. 



Colours in spirit yellowish white, fingers sometimes blackish in their basal 

 half. 



Length of carapace of largest specimen 9 millim., breadth 11 millim. 



In the Indian Museum are 11 specimens from the Andaman Sea at depths 

 between 130 and 290 fms. 



As the name Sphenomenis has been in use since 1860 for a genus of Coleop- 

 tera, Miss Mary J. Rathbun (Proc. Biol. Soc. Washington, XI. 1898, p. 164) 

 has proposed to alter the name of this genus to Sphenomerides. 



Family Povtuniclw. 



GoNiosoMA, A. Milne Edwards. 



Oonio^oma, A. MUne Edwards, Ann. Sci. Nat. Zool., (4) XIV. 1860, p. 263, and Arcliiv. du 3Ias. X. 1861, 

 p. 367 : Miere, Challenger Brachyura, p. 189. 



Goniosonia Jioplites, Wood-Mason. 



Goniosoma hoplites, Wood-Mason, Ann. Mag. Nat. Hist. (4) XIX. 1877, p. 422 : Aleock and Anderson, J. A. 

 S. B. Vol. LXIII. pt. 2, 1894, p. 181: 111. Zool. Investigator, Crust, pi. xxiii. fig. 6. 



Surface of body and appendages covered with a dense coat of very short 

 fine adherent hairs. Gastric cardiac and branchial regions well defined, the first 

 two tumid, the last inflated, the summit of their convexities with a few clustered 

 granules. 



The gastric region is divided into three subregions and is crossed transverse- 

 ly, near the middle, by an almost straight beaded line : each branchial region is 

 crossed transversely by an anteriorly-convex beaded line, which stops at the gas- 

 tric region : these are the only ridges on the carapace. 



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

 first five of which are broad and serrated, while the sixth is an acutely salient 

 spine much longer than the others. 



The space between the eyes, which is a third the greatest breadth of the 

 carapace (lateral spines not included) is cut into eight bluntish lobes, the middle 

 two of which are the broadest : the two outermost on either side (which belong 



