MARINE CRUSTACEANS. 257 



furrow is different, as will be seen by comparing the figures. (4) The peculiar tubercles on 



Fig. 55. Actaea splnosissinia ; a. whole animal, b. outside of hand, c. end of walking leg enlarged. 



the outside of the hand of A. fimcidata are replaced in A. spinosissima by sharp thorns, and 

 the teeth on the apposed edges of the fingers are less stout." 



Length : 4 mm. Breadth : 5-2 mm. Colour in spirit : white. 



Dredged in Mahlos Atoll, in 23 fathoms. 



43. Actaea perspinosa, n. sp. (Fig. 56). 



Diagnosis : " An Actaea nearly akin to A. Jlosculata, but differing from it in that, in place 

 of the characteristic petaloid spines 



of the latter species, it is covered 

 with stout, sharp thorns of an en- 

 tirely different shape." 



From A. spinosi'ssinia it differs 

 in the points indicated above, and 

 from A. acantha A.-M. Edw., 1861, 

 and A. hystrix Miers, 1886, in the 

 gi-eater size and smaller number of 

 the spines. 



Length: 4 mm. Breadth: .55 mm. 

 Colour in spirit : pure white. 



Dredged in Miladumadulu Atoll 

 in 25 fathoms. 



"^) 







a 



Fig. 56. 



Actaea perspinosa ; a. whole animal, b. outside of hand, 

 c. end of walking leg enlarged. 

 44. Actaea fossulata (Girard), 

 1859. Alcock, III. p. 148. (Fig. 41 A.) 



The bridge across the hollow on the carpopodites of the walking legs is not always to be found. 

 Taken on the reef at Hulule, Male Atoll, and in Funadu Velu, Miladumadulu. 



33—2 



