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Show 1900.] FROM SINGAPORE AND MALACCA. 761 7th, and across tbe base of the 6th, I find these to be, approximately, for most examples :- Length. Breadth. d 4*5 mm. 2 mm. $ 4 mm. 2-5 mm. giving a ratio for the female of 1 : 1-6, for the male 1 : 2-25. Dim. d 7x9. d 7-75x9-5. d 7-25x9. d 8-25x10-5. d 7 x 8-5. d 6-5 x 8. $ 7 x 8-5. $ 7 x 8-5. $ 7-25 x 8-75. $6-75x8. $6-5x8. $6x7-25. $5-5x6-5. Breadth taken across posterior margin, just above the last legs. LII. Genus ELAMENE M.-Edw. 93. E L A M E N E UNGUIFORNIS de Haan. Inachus (Elamene) unguiformis, de Haan, Crust. Japon. p. 75, pi. xxix. f. 1 (1839). Elamene unguiformis, Henderson, Trans. Linn. Soc, Zool. vol. v. p. 394 (1893). Hab. Singapore. A female. Dim. 6-25x6-5. LIV. Genus PINNOTHERES Latr. 94. PINNOTHERES SEMPERI Burger. Pinnotheres semperi, Burger, Zoolog. Jahrb. Bd. viii. p. 382, pi. ix. f. 28, & pi. x. f. 27 (1895). Hab. Singapore ; right respiratory tree of Holothuria scabra. A male, and a female with ova. The specimens which Dr. Burger has described came from the cloaca of Hoi. fusco-cinerea ; whereas the specimens we obtained from that Holothurian are, I find, referable to P. ortmanni. The host, from which came Dr. Burger's example of the latter species, was, I suppose, not known, as he makes no reference to it. In both these species, the animal was found high up the respiratory tree, forming an enormous gall; whether it would be able to extricate itself from this, and move, at will, up or down the respiratory tree, I do not know, but it has the appearance of being a fixture, nolens volens. Dim. $10-5x11. d 7-75x8. 95. PINNOTHERES ORTMANNI Burger. Pinnotheres ortmanni, Burger, Zoolog. Jahrb. Bd. viii. p. 384, pi. ix. f. 30, pi. x. f. 28 (1895). Hab. Singapore; right respiratory tree of Holothuria fusco-cinerea. Two females, both with ova. Dim. $12x11-5. $ 12-25x 1P75. 96. PINNOTHERES MODIOLICOLA Burger. Pinnotheres modiolicola, Biirger, Zoolog. Jahrb. Bd. viii. p. 370, pi. ix. f. 9, & pi. x. f. 9 (1895). |