4 THE PROCEEDINGS OF THE LINNEAN SOCIETY 



fact is scarcely perceptible, and the shell is smaller. It must be 

 admitted that these features are not more than slight, 

 and from the fact that the fluviatile shells of Australia have a 

 very wide range this may be a local variety. I have not, however, 

 distinguished it as a species, and for those who think the 

 characters sufficient it can stand as N. ptdligera var. sulcata, 

 N. pulligera is common in the Molluccas, Philippine Islands, and 

 has been found in the Pacific Ocean, New Caledonia (?). There 

 is a specimen in the Sydney Museum marked as from Guadalcanor. 

 This variety is also closely allied to N. petitti, Recluz, to which 

 it approaches in size, though it is smaller. The lip and columella 

 differ in color and shape. In N. 'petitii it is of rich reddish 

 brown, darker at the margins, but in this species it is light orange, 

 &c., as described. There are four Neritince described from 

 Australia, viz., N. tritonensis, Le Gillon, densely reticulated ; 

 N. auricidata, Lam. (as from New Holland), broadly auriculate 

 at each side of the aperture ; N. haconi, Reeve, from Swan 

 River, lineated or flexuously reticulated with black lines ; 

 N.'dringii, Recluz, spirally branded with yellow. All the above 

 are smaller than the present species or variety. 



N. pidligera was described by LinnaBus as a " smooth coarse 

 shell with an excavated eye-like small spire ; inner lip smooth 

 crenated." With the above named author it was a Merita and 

 came under his section 0, meant for a division with imperforate 

 shells and toothed lips. According to him it appears to have been 

 figured by our countryman Lister ftab. 143) by Seba (Mus. 3. t. 41, 

 figs. 23-26) by Rumphius {^Mus. tab. 22). Grmelin gives other 

 references, notably to Born in his Catalogue of the Museum of 

 the Empress of Austria in volume of plates. No. 17, figs. 9 and 

 10, and Chemnitz vol. 9, plate 124, figs. 1078, 1079. Gmelin also 

 says that it inhabits the rivers of India and is from 14 to 16 lines 

 long. He adds " shell hard, very finely striate transversly, pellucid 

 black or brownish or reddish {sic in Turton's edit.) ; whorls two, 

 one very large and terminating in an acute tooth ; throat 

 glabrous, polished, with a fine blue or whitish bottom, near the 

 margin a broad fulvous band ; inner lip ascending, glossy." 



