24 Gatliff and Gahrid : 



although they differ in size, length of spire, and outline of the lip — 

 which is occasionally more patulous — that there is only one species, 

 as indicated above, and that the specimens that we have examined 

 exhibit the slight variation comprised in the description and figures 

 of the forms included in the above synonymy. 



We also have examples of the si^ecies from Durban, South Africa, 

 and from the same locality, T. hofmnui, Angus. 



Pilsbry remarks on the genus, ^ "Tornatina differs from Retusa in 

 the conspicuously channeled suture, and the peculiar projecting 

 apex." These are distinguishing features in the type of the genus 

 T .voluta, Quoy and Gaimard. 



Iredale asserts2 that the genus Tornatina is a synonym of Retusa. 

 Before accepting this we should like to examine the apex of what is 

 authentically regarded as being typical species of Retusa. 



Lepidopleurus canci<:llatus, Sowerby. 



1908. Lepidopleurus cancellatus. Sowerby. Gatliff and 



Gabriel,' P. R.S. Vic, vol. xxi. (New Series), p. 



:3S:3. 



Obs. — We withdraw the record of the occurrence of this species on 



our coast. Our shell so identified is the species named, Ischnochiton 



gabrieli, Hull. 



Lepidopleurus oolumnarius, Hedley and May. 



1908. Lepidopleurus columnarius, Hedley and May, Rec. 

 Aust. Mus. vol. vii., p. 12:5. pi. 24, f. 27, 28. 



1912. Lepidopleurus pelagicus, Torr, T.R.S.S.A., vol. xxxvi., 



p. 165, pi. 5, f. 2a-f. 



1913. Lepidopleurus columnarius, Hedley and May. Gatliff 



and Gabriel, P. R.S. Vic. vol. xxvi. (New Series), 

 p. TS. 

 Hab. — Bass Straits, Commonwealth trawler " Endeavour." 

 Obs. — Du. Torr has kindly permitted us to examine with him his 

 type of L. pelagicus, and Ave find it conspecific. 



IscHXOCiirrox wilsoni, Sykes. 



1896. Ischnochiton wilsoni, Sykes. P. Malac. Soc. Loud. vol. 

 ii., p. 89, pi. 6, f. 1, la. 



1 Tryon Man. Conch., vol. xv., p. 182. 



•2 P. Mai. Soc. Lond., vol. xi., 1015, p. 300. 



