CimSTACEA OF THE MEEGUI ARCHIPELAGO. 29 



ot A. Milne-Edwards. The mobile finger is a little longer tlian 

 the other ; both are pointed, sulcate, and punctate, and thej are 

 a little granular and hairy at the base ; they are armed along 

 their inner margins with some teeth, which are rather feeble in 

 the female specimen, but strong in the male. The index of the 

 latter is armed with a very strong tooth near the middle, and, 

 moreover, with two or three smaller teeth between the first and 

 the point ; the mobile finger presents about six teeth, the two 

 basal ones of which are a little larger than the others. These 

 teeth, like the pointed tips, are of a white colour, and the 

 inner surface of the index is provided with a tuft of short hairs. 



Regarding the other legs, I refer to the accurate figure of 

 Krauss; the joints are granular along their upper and under 

 surfaces or margins. The chelipedes, as as well as the ambulatory 

 legSj are provided with tolerably long yellow hairs, which resemble 

 those of the carapace. 



As regards Cancer scaber,'Fahricms (Suppl. Entom. Syst. p. 336), 

 I tnay observe that it is doubtless a diflferent species, distin- 

 guished at first sight from A. parvula by its unequal cheli- 

 pedes, besides some other characters. But A. parvula cannot be 

 identified with Milne-Edwards's Xantho scaber {I. c. p. 390), a 

 species described as being closely allied to A. setigera, although 

 it has been referred to Fabricius's species, because it has not 

 been included among the species oi Actcsa described by Prof. A. 

 Milne-Edwards in his Monograph of this genus. 



Actcsa parvula, de Haan, so far as I know, has hitherto been 

 found only at the Cape and on the rocky coast of Natal. 



17. AcTJilA, sp. 



The collection contains a small mutilated specimen of a 

 species of Actcsa which I am unable to determine. This indi- 

 vidual is only 7 millim. long and 10| millim. broad. It is closely 

 allied to A. parvula, but the wliole upper surface of the cephalo- 

 thorax is lobed, the meropodites of the ambulatory legs are com- 

 paratively more enlarged, and the legs are covered with much 

 larger, though also conical^ granules. 



This specimen, however, which was collected at Elphinstonei 

 Island, may prove to be the young of the preceding species. 



