702 STUDIES ON AUSTRALIAN MOLLUSCA, xil., 



Potamojjyrgus ruppice, etc. Twenty years ago, Mr. J. H. Gatliff 

 gave me specimens of this, under another name, from Port Mel- 

 bourne, Victoria. 



LASiEA AUSTRALis Lamarck. 



Cyclas australis Lamarck, Anim. s. vert., v., 1818, p. 560; Fisi- 

 dium australe Smith, Journ. Linn. Soc, ZooL, xvi., 1881, p. 306; 

 Poronia purjmrasce^is Deshayes, Tr. elem. Conchyl., i., 1843-50, 

 p.740, PI. xiv. bis, figs. 16-1 9 ; Amphidesma nucleola Lamarck, 

 Anim. s. vert., v., 1818, p.493(>'o?e Recluz, Rev. Zool. Soc. Cuv., 

 vii., 1844, p.328); Poronia rugosa Recluz, Journ. de Conch., iv., 

 1853, p.50, PL ii., figs. 4, 5; Poronia scalaris, P. parreysii, and P. 

 purpurata Philippi, Zeit. fiir Malak., iv., 1847, p.72; Smith, Proc. 

 Malac. Soc, iii., 1898, p. 23; Gatliff & Gabriel, Vict. Nat., xxxi., 

 1914, p. 84; Poronia australis Souverbie, Journ. de Conch, xi., 

 1863, p.287, PL xii., fig.8; Id., Lamy, Bull, du Mus. d'Hist. nat., 

 1913, p.466. 



An interesting review of this species has lately been published 

 by Dr. Ed. Lamy. As his paper may not be readily accessible 

 to Australian conchologists, a summary of it is here offered. 



The types of Cyclas australis, labelled by Lamarck, and col- 

 lected by Peron at Timor and King George's Sound, W.A., are 

 preserved in the Natural History Museum of Paris. It is not a 

 fluviatile form, as the name would suggest, but a Lascea, closely 

 related to the European L. rubra. 



Amphidesma nucleola Lamarck, stated by its author to be a 

 native of the coast of France, is, on the contrary, affirmed by 

 Recluz to be identical with G. australis. As the type of that is 

 no longer extant, and as there is some doubt as to its authenticity, 

 and as the name has only page-precedence, not priority, over C. 

 australis, it will be safest to disregard it. 



Dr. Lamy recommends that die name of australis Lamarck, be 

 reserved for the larger and smoother form, and that the smaller 

 variety, with strong concentric sculpture, be named scalaris 

 Philippi, IMl { = rugosa ^eclwz, 1853). 



Authorities are divided as to whether the Australian species 

 is identical with, or distinct from, the European. Dr. Dall* has 

 *Dall, Trans. Wagn. Free Inst. Sci., iii., 1900, p.ll63. 



