356 ME. J. -R. HENDERSON — A CONTEIBUTION 



The male abdomen has merely a few granules on the first two segments ; but the sternal 

 region of the thorax is granulated. 



The wbole upper surface of the carapace, and outer surface of the chelipedes and legs,, 

 carry long yellowish green hairs, which are specially elongated on the margins of the legs. 



The carapace is 17'5 mm. long and 25' 5 mm. broad; the distance between the outer 

 orbital angles 14 mm., lower margin of hand and immobile finger li'5 mm., height of 

 hand 7*7 mm., length of dactylus 8 mm. 



This species is distinguished by the form of the lateral margin of its carapace, and 

 especially by the wide fissu.res, but also by the peculiar hairs with which it is clothed. 



Genus AcT.a:A, De Haan. 



51. ACT^A GRANULATA (Aud.). 



A. fframdata (Aud.), A. Milne-Edwards, Nouv. Arch. Mus. Hist. Nat. t. i. p. 27') (1865). 



( = A.'/mra, Stimpson). 



Tuticorin, three specimens, one carrying a SaccuUna ; Cheval Par {Thurston) ; reef at 

 Eameswaram (/. R. H.}. 



I have examined the type of A. carcharias. White, in the British Museum, and agree 

 with Miers that it is probably only a variety of A. grmiulata. 



Distribution . From the Red Sea and East Africa to China and Australia. 



52. AcT^A CALCULOSA (Milne-Edw.). 



A. calculosa (Mihie-Edw.), A. Milne-Edwards, Nouv. Arch. Mus. Hist. Nat. t. i. p. 27G, pi. xviii' 

 fig. 3 (1865). 



Tuticorin, thirteen specimens, including four females with ova; Muttuwartu Par 

 [Thurston). 



This species is allied to A. (jranulatu, but is smaller; the carapace is flatter and les& 

 contracted posteriorly, with the granules on its surface smoother ; the posterior margin 

 is granulated and there is a smooth transverse groove immediately in front of it, which 

 is not seen in A. granulata. In the present species also, the tubercles on the hand are 

 more rounded, the abdominal and sternal regions are smooth or only faintly granulated, 

 and the whole aspect is more glal)rous. 



The largest specimen (a male) has the carapace 11'3 mm. long and 15'5 mm. broad, 

 whUe the smallest female with ova is only 8'5 mm. long and 12 mm. broad. 



Distribution. Australia [A. 3Hlne-Edwards). 



53. AcT^A NODULOSA (White). 



A. nodulosa (Wliite), Adams & White, ' Samarang ' Crast. p. 39, tab. viii. fig. 4 (1848); Miers, 

 'Challenger' Brachyura, p. 120 (1886). 



Tuticorin, three females (one with ova) and two males {Thurston). 



The types in the British Museum are obviously young and only about half the size of 

 the largest Tuticorin examples, but there can be no doubt, I think, as to the identity 

 of the latter. The carapace is only moderately convex, with the anterior regions well- 



