Carcinological Fauna of India. 225 



Egeria investigatoris, n. sp. 



This species closely resembles Egeria arachnoides, adult males being 

 compared, but differs in the folio wiug particulars : — (1) the carapace is 

 more nearly circular, owing to the greater convexity of the hepatic and 

 pterygostomian regions ; (2) the spines on the carapace, although 

 almost tho same in arraugement, are markedly larger : (3) the sternum 

 has a transverse group of spines on every segment ; (4) every abdomi- 

 nal tergum except the last has a large median spine ; (5) the hiatus 

 between the post-ocular tooth and the basal antennal joint is scarcely 

 affected by a small denticle ; (6) the chelipeds in the adult male are 

 2J times the length of the carapace, and have the palm long, very 

 slender, and cylindrical, and the fingers sharply and evenly denticulated 

 all along their apposable edge. 



The legs are in fragments, but the joints that remain are extremely 

 long and slender. 



Length of carapace and rostrum ... 24+5 = 29 millim. 



Breadth of carapace ... ... 24 ,, 



Length of male chelipeds ... ... 65*5 „ 



Loc. Off Ceylon, 32 fathoms. 



Doclea, Leach. 



Doclea, Leach, Zool. MiscelL, Vol. II. p. 41. 



Doclea, Milne-Edwards, Hist. Nat. Crust. I. 292. 



Doclea, Miers, Journ. Linn. Soc, Zool., Vol. XIV. 1879, p. 652. 



Body and appendages tomentose, usually very densely so. 



Carapace circular, armed at the sides, and often on the dorsal 

 surface also, with a few spines. 



The rostrum consists of two vertically compressed spines which 

 are fused together in almost the whole of their extent and are usually 

 short : it has hence, usually, the appearance of a short flat emar- 

 gmate beak, hardly breaking the general outline of the carapace. (In 

 one species — Doclea tetraptera — the rostrum is rather long). 



The eyes are very small, and the commencing orbits are formed by 

 an acute post-ocular tooth and a little-prominent supra-ocular eave. 

 The antennae are very short and inconspicuous — not reaching to the 

 end of the short rostrum : the basal joint is short, broadly triangular, 

 the apex forming a sharp tooth : the flagella are almost rudimentary. 



The buccal frame is somewhat arched in front. The external 

 maxillipeds have the merus rather broader than the ischium, the 

 antero-external angle being slightly produced. 



The chelipeds are short and slender in the female ; longer, stout, 

 with an enlarged and inflated palm, in the adult male. 

 71 



