1900.] FROM THE SOUTH PACIFIC. 573 



Calappa hepatwa, de Haan, Faun. Japon., Crust, p. 70 (1833) ; 

 Alcock, J. As. Soc. Beng. lxv. 2, p. 142 (1896) ; Whitelegge, 

 Mem. Austral. Mus. iii. 2, p. 139 (1897). 



Funafuti ; one male, one female. 



Rotuma ; one male, four females. 



Tribe BRACHYGNATHA. 



Subtribe OXYKHYNCHA. 



Family Maiidi. 



Subfamily Inachin^. 



Genus Camposcia Latr., 1829. 



6. Camposcia retusa Latr., 1829. 



Camposcia retusa, Latreille, Cuvier's R. At). (2) p. 60 (1829) ; 

 A. M.-Edwards, H. N. Crust, i. p. 283, pi. xv. figs. 15, 16 (1834) ; 

 Alcock, J. As. Soc. Beng. lxiv. 2, p. 184 (1895). 



Rotuma ; one male. 



Subfamily Acanthonychin.e. 

 Genus Xenocarcinoides, nov. 



Characters of Xenocarcinoides, n. gen. : — 



Rostrum long, compressed, above faintly grooved and notched 

 at the tip, below hollowed and bearing on each side a thin wing. 



Carapace elongate-triangular, bearing large tubercles. 



Eyes moveable but not retractile, sunken in a pit formed by the 

 side of the rostrum and the immoveable second joint of the second 

 antenna. No pre- or postocular spines. 



Antenna with 1st and 2nd joints fused, subtriangular. Fla- 

 gellum hidden uuder rostrum. 



Third maxilliped with the meropodite subquadrate, as broad as the 

 ischiopodite, and bearing the carpopodite at its inner angle. 



Chelipeds large ; longer than either of the last three pairs of legs. 

 (The second pair of legs are unfortunately wanting in the specimen.) 

 The last three legs diminish gradually from before backwards. The 

 dactyles are somewhat sickle-shaped, toothed below, and as long 

 as the preceding joint. 



The abdomen of the male is six-jointed, owing to fusion of joints 

 5 and 6, between which, however, a furrow can still be seen. 



The genus differs from Xenocarcinus White in the shape of the 

 carapace and rostrum, and in the larger size of the chelipeds. 



7. Xenocarcinoides rostratus, n. sp. (Plate XL. fig. 1.) 



Diagnosis : " A Xenocarcinoides with the carapace provided w ith 

 ten tubercles arranged in an anterior and a posterior group of five 

 each, those of the hinder group being larger and more acute than 



Proc. Zool. Soc— 1900, No. XXXVIII. 38 



