THE FRESHWATER MOLLUSCA OF VICTORIA 
IIS 
River (Nat. Mus. Melb.) ; Williamstown ; Horsham; Geelong; 
Lake Hattah (J. E. Dixon) ; Box Hill (R. Hall) ; Studley 
Park (C. J. Gabriel). 
Vernacular Name. — The Sharp-point Pond-Snail. 
Observations. — A very thin, cylindrically ovate, light horn- 
colonred shell with a sharply pointed and elevated spire. 
Chapman (op. cit.) remarks that B. tasmanicus closely 
resembles the above species, but the apex is not so acute, nor 
is the aperture so open. 
Ameria acutispira (Tryon) var. yarraensis (Tenison 
Woods). 
(PI. II, Fig. 18.) 
1878 Physa yarraensis Ten. Woods, Tr. Roy. Soc. Viet., xiv, p. 64. 
1882 Aplexa yarraensis (Ten. Woods). Tate, Tr. Roy. Soc. S. Aust., 
iv, p. 76. 
1882 Physa Yarraensis Ten. Woods. Tate and Brazier, Pr. Linn. Soc. 
N.S.W., vi, p. 557. 
1882 Id. Smith, Journ. Linn. Soc. Lond., Zool., xvi, p. 289. 
1885 Id. Clessin, Conch. Cab., i, Abth. 17, p. 358. 
1917 Bullinus acutispira (Tryon) var. yarraensis (Ten. Woods). Hedley, 
Rec. Aust. Mus., xii. No. 1, p. 5, pi. 2, fig. 16. 
Size of Type. — Length, 11 nun. ; breadth, 6 mm. 
Localities. — ^Upper Yarra (Type, Nat. Mus. Melb.) ; 
Williamstown; Carrum Creek (T. Worcester). 
Vernacular Name. — The Yarra River Sharp-point Pond- 
Snail. 
Observations. — A thin, horny, shining shell, finely longitu- 
dinally striate, and with distant spiral lines of ciliae. 
Differing from acutispira Tryon by its less aemninate spire. 
Ameria acutispira (Tryon) var. ctlieridgii (E. A. Smith). 
(PI. II, Fig. 19.) 
1882 Physa Etheridgii Smith, Journ. Linn. Soc. Lond., Zool., xvi, p. 288, 
pi. 6, fig. 25. 
1885 Id. Clessin, Conch. Cab., i, Abth. 17, p. 242, pi. 34, fig. 1. 
1917 Bullinus acutispira Tryon var. etheridgii Smith. Hedley, Rec. Aust. 
Mus., xii. No. 1, p. 5. 
Size of Type. — Length, 11 mm. ; breadth, 6 mm. Aperture, 
7 mm. long; 3 mm. wide. 
Locality. — Yan Yean Reservoir. 
Vernacular Name. — Etheridge’s Sharp-point Pond-Snail. 
Observations. — Smith remarks: “This species resembles in 
some respects P. acutispira Tryon. The spire, however, 
