1898-3 A. Alcock — Carcinological Fauna of India. 139 



b. Wrist and hands sublobular, corresponding 

 joints of legs only a little dimpled (areola- 



tion of carapace complete) A. ruppdlii. 



c. Chelipeds and legs with a plain granular 

 surface, areolation of carapace faint ante- 

 riorly, incomplete posteriorly : — 



a. Lobulation of antero- lateral border 

 very indistinct, no hairs on the cara- 

 pace, which is thick and convex A. obesa. 



/3. Lobulation of antero -lateral border 

 fairly distinct the lobules being granu- 

 lar ; a thin coat of hair : — 



x. Carapace of ordinary Actaea 



form , A. pulchella. 



y. Carapace more than f as long 

 as broad ; its posterior half re- 

 markably flat A. parvula, 



ii. Carapace covered with tubercles, legs with tubercles or 

 spines : — 



1. Carapace with plain isolated tubercles : — 



a. Carapace with pearly tubercles and granules ; 

 front bilobed, but each lobe so deeply ex- 

 cised as to appear itself bilobed A. nodulosa. 



b. Carapace with coarse spine-like tubercles j 



front broadly bilobed A. echinus. 



c. Carapace and chelipeds with pedicled pisi- 

 form tubercles, legs with thorns A. peronii. 



d. Carapace, chelipeds and legs with pedicled, 

 flat-topped tubercles which at the margins 

 become petaloid ; front bilobed, each lobe 



cut into four petaloid teeth A. flosculata. 



2. Carapace closely covered with confluent tubercles 

 the surfaces of which are themselves formed of 

 confluent granules : — 



a. Tubercles of carapace very rough, raspberry- 

 like, some of those on the legs often spiny : 



carapace about seven-ninths as long as broad. A. granulata. 



b. Tubercles of. carapace smooth though pitted, 

 those of the legs never spiny : carapace 



about two-thirds as long as broad A. calculosa, 



II. Propodites and carpopodites of legs dorsally bicarinate in such 

 a way that the space between the crests appears like a trough 

 or a series of cups : — 

 i. Propodites and carpopodites each with one trough ; 



lobules of carapace granular; front not projecting much. A. cavipes, 

 ii. Carpopodites with at least two cups ; lobules of carapace 

 pitted as well as granular ; front projecting far beyond 

 the inner angle of the orbit A. fossulata. 



