528 STUDIES ON AUSTRALIAN MOLLUSCA, IX., 



Formerly Prof. Tate reduced it* to a synonym of Paludina 

 granum Menke; but ultimately! restored it to its former position. 



Incidentally it may be here remarked that Paludina granum 

 is a West Australian species whose description does not agree 

 with A. tasmanica, and whose figure J was not then known to 

 Prof. Tate. Nevill had referred P. granum to the genus Larina,^ 

 It is not to be confused with Assiminea granum Morelet, which 

 by its author was tinally regarded|| as a synonym of Hydrocena 

 hidalgoi Gassies. 



The shell was noticed by Mr. J. H. GatlifiP^ in Western Port, 

 Victoria. By Mr. T. Whitelegge it was added** to the fauna of 

 this State. It is abundant under sticks and stones and on weed 

 near high water mark in mangrove swamps. The individual 

 figured, 3-2.5 mm. long, I took in the Lane Cove near Sydney. 

 The species ranges north at least as far as the Richmond River. 

 In Queensland it is replaced by a species known by the MS. name 

 of A. affinis Mousson.ff 



Mr. F. E. Grant, who kindly drew for me the accompanying 

 figure of the radula, points out how closely it resembles the 

 radulae of other species of Assiminea illustrated by Tro.schel. 1 4 



The operculum, of which I show both aspects (Pl.xxxii., f.28, 29), 

 has not been previously figured. 



* These Proceedings, vi. 1881, p. 389. 

 t These Proceedings, xxvi. 1901, p. 305. 

 X PhiUppi, Abbild. Beschr. Conch, v. 1844, pi. iii., f.l6. 

 § Cat. Moll. Indian Mus. 1877, p.21. 

 II Journ. d. Conch, xxxi. 1883, p.208. 

 II Vict. Naturalist, xxii. 1905, p. 15. 

 ** .Journ. Proc. Roy. Soc. N. S. Wales, 1889, p. 321. 

 +t Cat. Godeffroy Museum, v. 1874, p. 103. Nevill, Handlist Moll. Indian 

 Museum, ii. 1884, p. 70. 



Xt Gebiss d. Schnecken, i. 1856, pi. vii., f.l3, 14. 



