228 A. Alcock — Carcinohgical Fauna of India, [No. 2, 



that, instead of only two spines on the lateral border of the branchial 

 region, there are three, the last being the largest and being placed 

 rather higher up, (so that, including the tooth-like basal antennal joint, 

 there are seven points on the antero-lateral border of the carapace) ; 

 and (2) that there is a coarse spine, or blunt tooth, on the posterior 

 border of the carapace. 



I do not think that these differences are of more than varietal 

 value ; for it is not uncommon in Doclea ovis, after careful denudation, 

 to find traces of tubercles corresponding to the additional spines of D. 

 japonica. 



In the Museum collection are specimens from the mouth of the 

 R. Hooghly. 



Doclea canalifera, Stimpson. 



Doclea canalifera, Stimpson, Proc. Acad. Nat. Sci., Philad., 1857, p. 217. 



Body and appendages, except the fingers and dactylopodites, cover- 

 ed with a dense velvet-like tomentum. Carapace subcircular with a 

 line of tubercles or spines down the middle line, namely, some minute 

 tubercles (only visible on the denuded carapace), followed by a spine, 

 on the gastric region ; a larger spine on the cardiac region ; and a much 

 larger one still on the posterior border : the antero-lateral border is 

 armed with four spines, the first bounding the outer edge of the pterygos- 

 toiuian canal, the last, which is rather larger than the spine of the 

 posterior border, standing near the middle of the branchiostegal border : 

 in addition, there is a small spine at the outer angle of the buccal frame, 

 but no spine between this and the basal antennal joint ; and there is a 

 line of extremely faint tubercles, only visible after complete denudation, 

 stretching obliquely on either side from near the front towards the last 

 epibranchial spine. 



The rostrum, which is hardly longer than the breadth between the 

 eyes, is sharply and deeply bifid at tip. 



The pterjgostomian region is longitudinally grooved. The cheli- 

 peds (in the young male) are slenderer than the next pair of legs, and 

 are equal to the length of the carapace between the base of the rostrum 

 and the base of the spine on the posterior border. The second pair of 

 trunk- legs, which are the longest, are a little less than twice the length 

 of the carapace and rostrum. 



Abdomen of the male seven-jointed. 



In the Museum are specimens from the mouth of the Hooghly and 

 from the muddy estuarine coasts of Orissa and of Arakan. 



