82 Proceedings of the Royal Society of Victoria. 



8. Triton toptirostris, Tate. 



T. nmiimum, T. Woods (non Hutton), P.R.S.Tas., 1876, p. 107. 

 T. tortirostris, Tate, Gast. I., 1888, p. 123, pi. v., fig. 7. 

 Tritonium inuiifniiin, Johnston, Geo. Tas., 1888, p. 237. 



9. Fusus acanthostephes, Tate. 



F. acanthostephes, Tate, Gast. I., 1888, p. 133, pi. vii., fig. 7. 



F. spiniferus, Tate, op. cit., p. 131, pi. vii., fig. 1. 



Observations. — I have no hesitation whatever in regarding F. 

 spiniferus, Tate, as a synonym of the above in view of my exano- 

 ination of a large series of specimens. Among the principal 

 differences upon which Professor Tate has apparently relied for 

 the specific distinction of F. spinifeiiis are the shorter spii^e, the 

 variable apex, and the difference of ornament, particularly the 

 absence of spiral ornament on the posterior slope of the whorls. 

 The Table Cape specimens are a particularly interesting series, as 

 some are ornamented in an exactly similar manner to F. spini- 

 ferus from the River Murray CliSs, as proved by the comparison 

 of actual specimens ; but their spire is as long as that in the 

 ordinai'y type of F. acanthostephes, and the embryonic whorls are 

 also identical with those in the latter species. Other specimens 

 approach F. acanthostephes in ornament and are important con- 

 necting links. A further examination of a large number of 

 specimens from Muddy Creek and Mornington clearly and amply 

 confirms the above conclusion, and it is at once seen that F. 

 acanthostephes varies in the length of its spire, the fulness and 

 size, and on that account appearance of the embryonic whorls, 

 and in its ornament, to such an extent that F. spiniferus cannot 

 possibly be regarded as specifically distinct. 



10. Fusus meredithse, T. Woods. 



F. gracillinuis, T. Woods (non Adams and Reeve), P.R.S. 

 Tas., 1875, p. 22. 



F. ineredit/iice, T. Woods, op. cit. Explanation lo pi. i., fig. 6. 



F meredithce, Tate, Gast. I., 1888, p. UO. 



F. meredithic, Johnston, Geo. Tas., 1888, p. 237, pi. xxxi., fig. 9. 



