

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



and obscurely defined. Ridge upon the external surface of the mobile finger strongly 

 beaded. Spots upon the carapace numerous, minute, simple, scattered, and without 

 any tendency to form reticulating lines. Length If in. ; breadth nearly 2 in. 

 Hab. Red Sea ; Zanzibar ; Indian Ocean ; Borneo ; Australia. 



This is the commonest and most widely distributed species of the genus. In the 

 females the ridge upon the external surface of the palm is replaced by a series of two 

 acute spines of unequal length, alternating with three small tubercles. The ridge upon 

 the external surface of the mobile finger is very obscure or obsolete. 



I adopt the name of M. pictrix for this species, as it is certainly figured by M. Milne- 

 . Edwards as Matuta victor in the Atlas of the ' Histoire Naturelle des Crustac^s ; ' and 

 it is also the commonest species of the genus. Perhaps the Matuta doryphora of La- 

 treille is also to be referred to this species. The description hardly suffices for its deter- 

 mination Avith certainty. 



1 a. Matuta victrix, var. crebbepunctata. (Plate XXXIX. fig. 4.) 



Cancer lunaris, Herbst, Naturg. der Krabben und Krebse, i. p. 140, pi. vi. fig. 44 (17$0) ? 



This differs from the preceding in having the carapace more coarsely granulated, the 

 spots very numerous, crowded, and forming small compound spots, each having the form 

 (under a lens) of a small curved line or circle with paler centre. In the females the 

 form of the hand is similar to that of M. victrix. 



Sab. Japan ; Fiji Islands ; New Hebrides. 



This variety, on account of its crowded, dark-red spots, presents a very different ex- 

 ternal appearance from the preceding ; and I am in some doubt whether it ought not to 

 be separated as a distinct species. 



(b) Carapace with numerous looped reticulated or anastomosing lines. 



2. Mattjta btjbbo-lineata, sp. n. (Plate XXXIX. figs. 5 & 6.) Carapace finely but 

 distinctly granulated. Two anterior tubercles of the carapace obsolete, the others, 

 as well as the tubercle upon each posterolateral margin, faintly marked. Lateral 

 marginal spine long and acute. Pront distinctly emarginate, the lobes more acute 

 than in M. victrix. Hand of male nearly as in that species, but with the spine at 

 base of the oblique ridge shorter. The lines upon the carapace light red, often 

 interrupted and more crowded anteriorly, rarely forming complete loops and circles. 

 Length 1^ in. ; breadth 1^- in. 

 Sab. Indian and Pacific Oceans ; Cheefoo. 



A specimen presented by the Smithsonian Institution is named M. lunaris. 

 In the females the oblique ridge upon the palm is replaced by a series of five promi- 

 nences, the second of which is an acute spine, the others small and tuberculiform. The 

 ridge upon the mobile finger is obsolete. In coloration this species resembles Matuta 

 lunaris, but differs in the oblique ridge upon the external surface of the hand, and the 

 beaded ridge upon the external surface of the mobile finger. 



