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Show 1900.] MARINE FAUNA OF CHRISTMAS ISLAND. 131 E C I O N E M A BACILLIFERUM (Carter). 1887. Stelletta bacillifera Carter (4. p. 78, pi. vi. figs. 9-14). 1897. Ancorina simplex Lendenfeld (9. p. 96, pi. ix. figs. 12-34). 1898. Ecionema. bacilliferum Lindgren (10. p. 335, pi. xvii. fig. 17 ; pi. xix. fig. 27). 1899. Ecionema bacilliferum? Lindgren (10 A. p. 88). The largest of the four specimens in this collection is 4 x 5 c.c. in area and 1 c.c. in thickness, and forms a thick crust; in colour pale brown mottled with dark brown. The type specimen from Mergui, being in the Calcutta Museum, is not available for comparison. The protriaenes are very rare in the Christmas Island specimens. The microstrongyles, which are 18 x 2 p in size, are occasionally centrotylote. The fine cortical oxeas measure 180 x 4 p. The asters are tylote, and with roughened actines, the same characteristics being found in the asters of Ancorina simplex, of which species the Museum possesses a few slides prepared from the type specimens from Zanzibar. Distribution. Mergui, Java, Christmas Island, Zanzibar ; var. robustum : Port Phillip, Ports Elliot and Adelaide. STELLETTA SIMPLICIFURCA (Sollas). 1886. Myriastra simplicifurca Sollas (16. p. 189). 1888. Myriastra simplicifurca Sollas (17. p. 114," pi. xii. figs. 29-33). 1898. Stelletta simplicifurca Lindgren (10. p. 332, pi. xviii. fig. 8). Of the three specimens of this species, one is small ( 8 x 6 x6 m m . ) and oval; the other two are in the form of thick nodular lauiellse, the larger being 5 x 3 c.c. in area and from 1 to 2 c.c. in thickness. Ortholrisenes. Bhabdus... Anatriaenes. Bhabdus ... Anatriasnes. Chordi Anatriaenes. Sagitta Small spec. Christmas 1. 1375x50 280 1820x22 105 122 88 1925x49 102x6 12 Largest spec. Christmas I. 1825x52 245 1330x15 54 72 48 1330x24 210x3 12 Torres Straits. ' Challenger.' 2325x55 366 1860x29 120 127 90 2000x31 252x3 12 Cochin China. Lindgren. 2700x84 (54), ? 540 3240x30 108 168 84 2900x60 252x4 12 The surface of the lamellse presents a tessellated pattern, the 9* |