MR. E. J. MIERS ON THE OXYSTOMATOUS CRUSTACEA. 247 



The second and fourth of the series of prominences on the external surface of the hand 

 are acute, spiniform. The ridge upon the outer surface of the mohile linger is obsolete. 

 The example figured by Hess under the name of M. picta is almost certainly the young 

 of this species ; and I have therefore adopted his specific name. It is easily distinguished 

 by the tendency of the spots upon the carapace towards a disposition in reticulating 

 lines. 



The Matuta distmguenda, Hoffmann, Recherches sur la Faune de Madagascar, &c, 

 Crust, p. 27, pi. vi. figs. 49-52, vii. 53-57 (1874), may, I think, be this species, although 

 in the figure, which is evidently much exaggerated, the front is represented as entire, 

 the tubercles much more prominent than in any species of the genus known to me, 

 and the immobile finger of the hand of the female much abbreviated. 



(b) Carapace marked with looped, reticulating, or anastomosing lines. 



8. Matuta outusifrons, sp. n. (Plate XL. figs. 8 & 9.) Carapace rather coarsely 



granulated, especially in the centre and towards the lateral spines ; tubercles all 

 strongly marked and distinct. Lateral marginal spines of moderate length, acute. 

 Front small, obtuse, rounded, and entire. Hand very faintly granulous upon its 

 external surface, tubercles upon the upper part not strongly marked ; ridge in the 

 male nearly as in the preceding species. Ridge upon the mobile finger very finely 

 striated for the greater part of its length, and obscurely beaded towards the distal 

 extremity. Lines upon the carapace dark red, forming irregular loops and circles, 

 which are smaller and more crowded anteriorly, and interspersed with spots. Length 

 and breadth \\ in. 



Sab. Fiji Islands ; New Hebrides. . 



In the female the same differences in the sculpture of the hand are observed as in the 

 preceding species. 



9. Matuta lunaris. (Plate XL. figs. 10 & 11.) 



Cancel- lunaris, Herbst, Krabben u. Krebse, iii. p. 43, pi. xlviii. fig. 6 (1799). ^Vo , 

 Carapace very finely granulated ; tubercles of the carapace and posterolateral margins 

 obsolete (except in quite young specimens). Lateral marginal spines acute, of 

 moderate length. Front divided by a triangular emargination into two sharply 

 defined acute lobes. Hand not granulous, or very faintly granulous below; tuber- 

 cles upon the upper part strongly marked ; ridge upon the external surface in the 

 male divided into five lobes, of which the second is acute, spiniform, and the others 

 small, tuberculiform. Ridge upon the mobile finger obsolete. Lines upon the 

 carapace pale red, more interrupted than in the preceding species.. Length and 

 breadth about li| in. 

 Kab. Indian Ocean, Ceylon. 



The form of the hand is almost exactly the same in the male and female of this 

 species. 



