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Show 1900.] FROM SINGAPORE AND MALACCA. 763 on the females ; but only a few small spots on the meri. In one the males tbe spots on the carapace are arranged in pairs, or even in groups of three, giving it a more densely spotted appearance. I may add that I should describe the rostrum, in these individuals, as being distinctly emarginate (vide Alcock, t. c, " rostrum entire or faintly emarginate " ; and Miers, t, c, " front obtuse and rounded or obscurely emarginate " ) , the emargination taking the form of a wide, triangular notch, quite as distinct as in M. lunar is. Otherwise they entirely agree with Mr. Alcock's description. Dim. d 35x34. d 32x30-5. d 31-75x31. d 29x28-75. d 25-5x24-25. $22x21-25. $21-5x20-5. 100. MATUTA LUNARIS Herbst. ? Cancer lunaris, Herbst, Krab. u. Krebse, i. p. 140, pi. vi. f. 44 (1790). Matuta planipes, Fabr. Suppl. Ent. Syst, p. 369 (1798). Cancer lunaris, Herbst, op. cit. iii. p. 43, pi. xlviii. f. 6 (1799). Matuta lunaris, Miers, Trans. Linn. Soc. 2nd ser. Zool. vol. i. p. 247, pi. xl. f. 10 (1877) ; Alcock, Journ. As. Soc. Bengal, vol. lxv. pt. ii. No. 2, pp. 161-2 (1896). Hab. Malacca ; littoral. Two young males and a female. Dim. d 22-5x21-25. d 16-25x15. $20x19. LVI. Genus LEUCOSIA Fabr. 101. LEUCOSIA CRANIOLARIS Herbst. ? Cancer craniolaris, Linn. Syst. Nat. 12th ed. p. 1041 (1766) ; Herbst, Naturgesch. d. Krab*. Bd. i. Hft. ii. p. 90, pi. ii. f. 17 (1783); Fabr. Ent. Syst. ii. p. 441 (1792). Leucosia craniolaris, Fabr. Suppl. Ent. Syst, p. 350 (1798); Bell, Trans. Linn. Soc vol. xxi. p. 283 (1855). Leucosia craniolaris, var. Icevimana, Miers, ' Alert' Crust, p. pi. xxvi. f. A (1884). Leucosia craniolaris, Walker, Journ. Linn. Soc, Zool. vol. xx. p. Ill (1887); Henderson, Trans. Linn. Soc, Zool. vol. v. p. 397 (1893); Alcock, Journ. As. Soc. Bengal, vol. lxv. pt. ii. No. 2, p. 231 (1896). Hab. Singapore and Malacca; 5 fms.; muddy bottom. Two females, of which the larger is from Malacca. Dim. $ 19x21-75. $ 14-5x16. 102. LEUCOSIA RHOMBOIDALIS de Haan. Leucosia rhomboidalis de Haan, Crust. Japon. p. 134, pi. xxxiii. f. 5 (1839); Bell, Trans. Linn. Soc. vol. xxi. p. 284 (1855). Leucosia maculata, Stm. Proc. Ac. Nat. Sci. Philad. p. 159 (1858). Leucosia rhomboidalis, Alcock, Journ. As. Soc. Bengal, vol. lxv. pt. ii. No. 2, p. 234 (1896). Hab. Singapore : 5 fms.; muddy bottom. A male and a female. Both these individuals have a row of three yellow spots arranged |