BY C. HEDLEY. 



19 



Marginella mayii, Tate. 

 Tate, Trans. Roy. 8oc. S.A. xxiv., 1900, p. 93. 

 Mr. Brazier has shown me a shell of which he took a sinole 



o 



specimen in 8 fathoms off the Inner North Head, Sydney Harbour. 

 By comparison with an authentic specimen received from Mr. 

 W. L. Ma}'' I have identified this as a dwarf form of M. mayii. 



Vermetus caperatus, Tate & May. 



Thylacodes caperatus, Tate cfe May, Trans. Roy. Soc. S.A. xxiv., 

 1900, p. 94. 



During a recent excursion of the Field Naturalists' Club to 

 Balmoral this species was found by myself and others for the first 

 time in Australia in 

 plenty under stones at 

 half tide level. 



The authors of this 

 species state that the 

 animal is unknown. 

 Mr. H. L Kesteven has 

 Operculum and radula. j^-^^j^^ prepared for me 



the drawings for the accompanying illustrations 

 of the operculum, radula and the jaw as a whole and in detail. 

 The presence of an operculum necessitates the removal of the 

 species from Thylacodes. 



Bifidaria macleayi, Brazier. 



Fnpa {Vertigo) tnicleayi^ Brazier, Proc. Linn. Soc. N.S.W. i. , 

 1876, p. 110. 



(Plate iii., fig. 39.) 



M}' drawing of this hitherto unfigured species is taken from an 

 authentic specimen in the Macleay Museum, 2-5 mm. in length. 

 It is labelled Barnard Islands, No. iii., a locality not named in 

 the original description. The genus Bifidaria was described by 

 Sterki.* 



Jaw. 



* Sterki, The Nautilus, vi., p. 99, Jan. 1893. 



