302 STUDIES ON AUSTRALIAN MOLLUSCA, xi. 



211, figs. 9, 10 ; Nor A. tricolor Reeve, Conch. Icon, xv., 1864, PI. 

 xi., fig. 48. 



Five shells in the British Musuem are labelled, "tricolor Gray, 

 Voy. Fly, ii., 357, PL i., 4, enlarged, Cape York, M.C." They were 

 about half an inch in length, solid, highly polished, ovate-acumi- 

 nate, with a faint umbilical furrow. The colour is buff, with white 

 on the base and on a subsutural band, the latter succeeded by an 

 orange thread. 



Notes on the tablet indicate that these five are identical with A. 

 novaezelandiae Sowerby, and with A. nana Watson. 



In every particular, these five fail to agree with Gray's account, 

 and I regard them as wrongly determined. But Gray's figure and 

 description agree precisely with A. cingulata Sowerby, which I 

 have collected just where the original A. tricolor was taken. 

 Sowerby and Reeve evidently derived their information about A. 

 tricolor from a substitute, not from authentic material. By a fur- 

 ther complication, .4. bicolor, meaning A. tricolor Sowerby, not J.. 

 tricolor Gray, is reported from New Zealand in place of A. novce- 

 zelandice* 



Try on erred in uniting A. novcezelandice to A. sinensis Sower- 

 by, and A. inornata Smith, f The London collection shows these 

 to be distinct species. Ancilla obesa Sowerby, and J., mauritiana 

 Sowerby, have been reported as Australian, but such references 

 are apparently erroneous. 



Marginella translucida Sowerby. 



Marginella translucida Sowerby, Thes. Conch., i., 1846, p. 376, 

 PI. 75, figs. 62, 63. 



M. volutiformis Reeve, Conch. Icon, xv., 1865, PI. 24, fig. 31. 



From the Cuming Collection are three poor specimens, which, if 

 not types, are yet probably authentic specimens, labelled "M. trans- 

 lucida Sow., Thesaurus i., p. 376, PI. 75, fig. 62-3, Hab. Australia," 

 but on the face of the tablet "W. Indies." Again there is a single 

 specimen marked type, labelled, "volutiformis, Rve. Conch. Icon., f. 



*Hutton, Index Faun. Nov. Zealand, 1904, p.74. 

 fTryon, Man. Conch., v., 1883, p.95. 



