74 Mr. R. I. Pocock on 



Our knowledge of the species of the genus Trapezia is 

 in a very unsatisfactory state. I refer these specimens to 

 guttata of Riippell on the strength of the following cha- 

 racters :• — a uniformly coloured thorax with a spine on each 

 side of it, and legs bearing more or less faint indications of 

 spots. 



10. Actumnus set/for, de Haan. 



Actumnus setifer, de Haan, Crustacea iu Siebold's ■ Fauna Japonica,' 

 p. 50, pi. iii. tig". 3. 



A small specimen on Macclesfield Bank at a depth of 32 

 fathoms. 



11. Daira perlata (Herbst). 



Daira perlata (Herbst), Milne-Edwards, Crust, i. p. 387. 



A single specimen taken in 3 feet of water at the north- 

 eastern extremity of the reef. 



12. Ackea tessellata, sp. n. 



Carapace wide, about as wide in proportion to its length as 

 in A. rufopunctata, but more rounded at the sides ; furnished in 

 every part with distinctly defined lobes which exactly resemble 

 the similar lobes in A. rufopunctata in being covered with 

 rounded close-set granules ; the depressions which separate 

 these lobes are clothed with short hairs ; at the edge of the 

 carapace the lobes are not distinct, as in rufopunctata, but 

 merely represented by clusters of sharper granules, which 

 give to the carapace the appearance of being laterally spinu- 

 lose ; the frontal region furnished with four lobes, as in rufo- 

 punctata ; margins of the orbits granular, but less dis- 

 tinctly lobate than in rufopunctata ; the anterior half of the 

 carapace, behind the orbits and the posterior frontal lobes, is 

 furnished as in rufopunctata with eight lobes arranged in 

 a transverse series ; of this series the two which are close to 

 the middle line are almost continuous in front with the poste- 

 rior frontal lobes, while behind they are separated from each 

 other by a very conspicuous elongate median lobe ; at the 

 posterior extremity of this and on each side of it there is a 

 single small rounded lobe, and behind these three a single 



111** 



transverse lobe. This arrangement ot granular lobes in tins 

 region of the carapace does not occur in any specimen of 

 rufopunctata that 1 have seen ; the arrangement of lobes on 

 the rest of the carapace is much the same in the two species. 



