248 



L. A. BORRADAILE. 



(1) The fore edge of the meropodites of all the walking legs bears three spines besides that 

 at the end of the joint. In de Man's race there is only one, and that is wanting from the 

 last leg. (2) The red colour mentioned by de Man is wholly wanting, though of course this 

 may be due to the state of preservation. 



Taken in South Nilandu Atoll, in 19 — 25 fathoms. 





Fig. 48. Pilumnus alcocki; a. whole animal, 6. outside of hand. 



14. Pilumnus alcocki, n. sp. (Fig. 48). 



Diagnosis : " A Pilumnus with the carapace of moderate breadth only, covered rather sparsely 

 with long hairs but without pubescence, the regions well marked ; the front almost straight, slightly 

 arched, not deeply notched in the middle, bearing a fringe of very long hairs ; the anterolateral 

 edge raised into three low mounds, the hindermost of which is very inconspicuous ; the outer 

 orbital notch shallow, the inner wanting, the lower orbital rim granular, the orbital angle not 

 at all jjrominentj the chelipeds subequal, granular and covered with long hairs, the fingers 

 gaping, somewhat furrowed and toothed ; and the walking legs short, stout, hairy and pubescent, 

 and without thorns on the meropodites." 



Length : 4-8 mm. Breadth : 6-2 mm. Colour in spirit : white. 



Dredged in 20 fathoms in Suvadiva Atoll. 



I have called this species after Major A. Alcock, F.K.S., to whose excellent work ofi the 

 Indian Crabs it has so often been necessary to refer in the present paper. 



Genus Actumnus Dana, 1851. 



15. Actumnus globosus (Dana), 1852. 



Pilumnus glubosus, Dana, U.S. Expl. Expd. Crust, i. p. 236, pi. xii. fig. 10 (1852). 



By the shape of its body this species seems to belong to Actumnus, rather than to 



