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Show 1900.] FROM SINGAPORE AND MALACCA. 743 XXXIII. Genus PILUMNUS Leach. 52. PILUMNUS VESPERTILIO Fabr. Cancer vespertilio, Fabr. Suppl. Ent. Syst. p. 338 (1798). Pilumnus vespertilio, M.-Edw. Hist. Nat. Crust, t. i. p. 418 (1834). Pilumnus ursulus, Ad. & White,' Samarang ' Crust, p. 45, pi. ix. f. 6 (1848). Pilumnus mus, Dana, U.S. Expl. Exped., Crust, pt. i. p. 240 (1852). Pilumnus vespertilio, de Man, Mergui Crust, p. 58 (1888); Walker, Journ. Linn. Soc, Zool. vol. xx. p. 110 (1887). Hab. Singapore; littoral. One large male, four smaller ; a small female, and a very young male. The grauulations of the under surface of the larger hand tend to disappear in the largest male (cf. de Man, t. c). Dim. d 24-5x19. d 13x10. d 10x7. d 10x7. d 8-5x6-5. $ 10x7-5 53. PILUMNUS LABYRINTHICUS Miers. Pilumnus labyrinthicus, Miers, ' Alert' Crust, p. 224, pi. xxii. f. C (1884); Walker, Journ. Linn. Soc, Zool. vol. xx. p. 110 (1887); Henderson, Trans. Linn. Soc, Zool. vol. v. p. 365 (1893). Hab. Singapore ; 5-15 fms., rough bottom. Two adult females and three very young males. Dim. $ 12-5x10. $ 9x7-25. d 5x6. 54. PILUMNUS MINUTUS HIRSUTUS. ? Pilumnus minutus, de Haan, Crust. Japon. p. 50, pi. iii. f. 2 (1839). Pilumnus hirsutus, Stimpson, Proc. Ac. Nat. Sci. Philad. p. 37 (1858); Hasw. Cat. Austr. Crust, p. 69 (1882). Pilumnus minutus?, var. hirsutus, Miers,' Challenger ' Brachvura, p. 154 (1886). Hab. Singapore; littoral, from broken stones and coral. One larger male, damaged, and two smaller. I agree with Mr. Miers in thinking it very probable that de Haan's P. minutus is nearly identical with P. hirsutus of Stimpson. Dim. d 9x7. d 6x4-5. d 4-5x3-5. 55. PILUMNUS L^EVIS Dana. Pilumnus Icevis, Dana, Conspectus Crust., Proc. A c Nat. Sci. Philad. vol. vi. p. 82 (1852) ; de Man, Mergui Crust, p. 66, pi. iv. ff. 1-2 (1888) ; id. Zoolog. Jabrb. Bd. viii. p. 553 (1895). Hab. Singapore ; ? depth. A small male. The infra-orbital margins may be seen to be finely granulous under the lens, but there is no hiatus just under the outer orbital angle on the right side ; as in Dr. de Man's somewhat larger |