1900.] 



MARINE FALXA OF CHRISTMAS ISLAND. 



131 



Ecionema bacilliferlm (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 baciUiferum Lindgren (10. p. 335, pi. xvii. fig. 17 ; 

 pi. xix. fig. 27). 



1899. Ecionema baciUiferum? Lindgren (10a. 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 fi in size, are occasionally centrotylote. The fine cortical 

 oxeas measure 180 x 4 fx. 



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. 

 figs. 29-33). 



1898. Stelletta simplicifurca Lindgren (10. 

 fig. 8). 



Of the three specimens of this species, one is small (8x6x6 

 mm.) and oval ; the other two are in the form of thick nodular 

 lamellae, the larger being 5x3 c.c. in area and from 1 to 2 c.c. in 

 thickness. 



p. 114," pi. xii. 

 p. 332, pi. xviii. 



The surface of the lamella? presents a tessellated pattern, the 



9* 



