12 MR. E. J. MIERS ON [Jail. 15, 



legs, and by having a series of granules or small tubercles on the 

 inferior margin of the palm of the chelipedes. It has been hitherto 

 a desideratum in the Museum collection. 



The types of MM. Eydoux and Sonleyet were obtained at the 

 Sandwich Islands: hence" it is evidently a widely-distributed Oriental 

 species. 



The largest specimen (the female) presents the following 



dimensions : — 



liues. milliiu. 



Length of carapace 10 21 



lireadth of carapace 11^ 24*5 



Length of larger chelipede, nearly 22 46 



I believe the Trapezia latifrons, A. Milne-Edwards', from the 

 Sandwich Islands and New Caledonia, to be very probably a younger 

 condition of this species. The carapace, however, is represented as 

 broader and more triangulate in shape, the frontal lobes as less 

 prominent, the lateral marginal teeth of the carapace as more acute, 

 and the areolae of its dorsal surface yet larger and less numerous. 

 1 therefore hesitate to quote it as synonymous with T.Jlavopunctata. 



LiSSOCARCINUS ORBICULARIS. 



Lissocarcinus orbicularis, Dana, Proc. Acad. Nat. Sci. Philadelphia, 

 p. 8C (1852); Crustacea in U.S. Exploring Expedition, xiii. (1) 

 p. 288, pi. xviii. fig. 1 (1852) ; A. Milne-Edwards, Archives du 

 Museum d'hist. naturelle, x. p. 418 (1861). 



A small male is in the collection, which in coloration and all other 

 particulars nearly agrees with Dana's description and figure, based 

 on a specimen from the Fijis. 



XeNOPHTHALMODES MtEBH. 



Xenophthalmodea mcebii, Richters, Decapodain Mobius's Beitrage 

 zur Meeresfauna der Insel Mauritius, p. 155, pi. xvi. fig. 29, and 

 pi. vii. figs. 1-9 (1880). 



Two femabs are in the collection. 



This form has been hitherto a desideratum in the collection of the 

 British Museum. I believe its true generic position to be in the 

 family Rhizopidce in the vicinity of Rhizopa and Typhlocarcinus, 

 Stimpson^; and perhaps it may not be generically distinct from one 

 or the other of the above-mentioned genera, a point which, in the 

 absence of males for comparison, I will not undertake to determine. 

 In external aspect it altogether resembles Typhlocarcinus ; it is distin- 

 guished, however, from all the species both of Typhlocarcinus and 

 Rhizopa with which I am acquainted by the entire an tero- lateral 

 margins of the carapace. It has apparently no very near affinities with 

 Xenophthalmus, "White, with which Dr. Richters compares it ; although 



' Annales de la SocieteEntomologique de Paris, vii. p. 281 (1867) ; Nouvelles 

 Archives du Museuiu, ix. p. 259, pi. x. fig. 7 (187o). 

 " Proc. Acad. Kat. Sci. Philadelphia, pp. 96, 97 (1858). 



