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Show 1900.] FROM THE SOUTH PACIFIC 593 ridges on the branchial regions and faint transverse markings on the front; no tooth behind that forming the orbital angle ; the chelipeds smaller than in P. minutus, the hands less swollen, a ridge running along the lower part of the hand and continued on to the finger ; the fingers spoon-like at the ends, which are fringed with short stiff hairs, the arm bearing at its distal end on the inner side a crest of three teeth, the wrist with a spine on the outside at the distal end; the legs slender and almost hairless ; the meropodite of the walking-legs with one tooth above and two below at the outer end ; the propodite slenderer than in P. minutus." The third maxilliped is shown in fig. 7 a. Colour in spirit: greenish, banded on the legs with brown. Length 6 mm. Front 5 mm.; tip to tip of orbital spines 7'5 mm. This species belongs to the group with no tooth behind the orbital angle, including P. corrugatus Martens 1872, P. cethiopicus Hilg. 1869, P. minutus A. M.-Edw. 1873, P. plicatus H. M.-Edw. 1837, and P. longipes Eathbun 1893. Funafuti; one female. Genus GEOGRAPSUS Stimps., 1858. 70. GEOGRAPSUS GRAYI (H. M.-Edw.), 1853. Grapsus grayi, H. M.-Edwards, Ann. Sci. Nat. (3) xx. p. 170 (1853). Geograpsus rubidus, Stimpson, Proc. Ac. N. Sci. Philad. 1858, p. 103. Geograpsus grayi, H. M.-Edwards, Nouv. Arch. Mus. (1) ix. p. 288 (1873); Kingsley, Proc. Ac. N. Sci. Philad. 1880, p. 196. Funafuti; two males, four females. Rotuma ; one male, one female. Subfamily SESARMIN^E. Genus SESARMA Say, 1818. 71. SESARMA AUBRYI A. M.-Edw., 1819. Sesarma (Holometopus) aubryi, A. M.-Edwards, Nouv. Arch. Mus. (1) v. Bull. p. 29 (1869); (1) ix. p. 307, pi. xvi. fig. 2 (1873). ' Sesarma aubryi, de Man, Zool. Jahrb. ii. Syst. 3, p. 642 (1887). Botuma; one male. 72. SESARMA GARDINERI, n. sp. (Plate XLII. fig. 8.) Diagnosis. " A Sesarma in which the front is half the fronto-orbita'l breadth, the latter rather less than the length of the carapace ; the front hidden from above by the frontal lobes, the frontal edge divided into five shallow bights by four projections, not denticulate; the frontal lobes prominent, sharp, denticulate, the |