THE FRESHWATER MOLLUSCA OF VICTORIA 
125 
AncyUls tasmanicus Tenison Woods. 
(PI. Ill, Figs. 32, 32a). 
1875 Ancylus tasmanicus Ten. Woods, Pr. Roy. Soc. Tas., p. 70. 
1879 Id. Johnston, Pr. Roy. Soc. Tas., p. 25. 
1894 Id. Whan, Geelong Nat., iv. No. 10, p. 9. 
1896 Id. Fielder, Viet. Nat., xii, No. 11, p. 140. 
1920 Id. May, Pr. Roy. Soc. Tas., p. 71, pi. 10, figs. 15, 16. 
1921 Id. May, Check-list Moll. Tas., p. 90. 
1923 Id. May, 111. Index Tas. Shells, pi. 41, fig. 22. 
Size of Type. — Length, 3-35 mm.; breadth, 15-2 mm.; 
height, l'5-2 mm. 
Localities. — Heidelberg (Rev. W. Fielder) ; Moorahool R. 
(J. H. Young) ; Frankston (J. A. Kershaw and T. Worces- 
ter) ; Nangeela (Rev. Whan) ; Lome (C. J. Gabriel). 
Vernacular Name. — Tasmanian Freshwater Limpet. 
Observations — Avery small, ovate, diaphanous, horny shell, 
concentrically striate and very faintly rugosely radiate, more 
or less covered and spotted with a black epidermis, apex 
obtuse. From A. australicus Tate, it is distinguished by its 
proportionately greater height, and its obtuse apex. W. L. 
May (1920) regards A. mariae Petterd as possibly a variant 
of tasmanicus Ten. Woods, but in 1921 records these two 
forms as distinct species. Petterd, Journal of Conchology, 
iv., 1884, p. 159, remarks: “that his own species A. assimilis 
from Richmond River, New South Wales, is close to A. tas- 
manica Ten. Woods and may prove to be identical. It 
appears to be broader, with the apex more twisted. ’ ’ Common 
on eucalyptus leaves, Erskine River, Lome. 
Genus GUNDLACHIA Pfeiffer, 1849. 
Gundlachia petterdi Johnston. 
(PI. Ill, Fig. 33). 
1879 Gundlachia petterdi Johnston, Pr. Roy. .Soc. Tas., p. 23. 
1897 Ancylus woodsii Johnston, Pr. Roy. Soc. Tas., p. 25. 
1881 Gundlachia Petterdi Johnston. Tate and Brazier, Pr. Linn. Soc. 
N.S.W., vi, p. 559. 
1884 Id. Tate, Pr. Roy. Soc. Tas., p. 216. 
1888 Gundlachia beddomei Petterd, Pr. Roy. Soc. Tas., for 1887, p. 41, 
pi. 44. 
1893 Gundlachia petterdi Johnston. Hedley, Viet. Nat., x. No. 9, p. 148, 
left fig. 
1893 Gundlachia beddomei Petterd. Hedley, op. cit., right fig. 
1894 Gundlachia petterdi Johnston. Hedley, Pr. Linn. Soc. N.S.W., (2 
ser.), viii, p. 509, pi. 24, figs. 1-3, and 7-11. 
