112 
THE FRESHWATER MOLLUSCA OF VICTORIA 
turata merges so gradually into tenuistriata that they must 
be considered one species. As depicted in Hedley’s excellent 
illustration, texturata is certainly a little more elongated, but 
the intermediates prevent its acceptance as a species. A 
typical specimen of tenuistriata from Overland Corner, Vic- 
toria, figured by Hedley is 13 mm. long and 9 mm. broad. He 
remarks: “the suture is margined beneath by a narrow pale 
line followed by a broader dark band. There is also a broad 
dark stripe within the outer lip. The sculpture consists of 
exceedingly delicate radial threads which may or may not be 
broken into short lengths by spiral striae.” Of Physa tex- 
turata, Sowerby writes: “under a lens this appears as if 
impressed with a fine woven fabric”; does this not equally 
apply to tenuistriata? 
In his paper on the Generic Position of the so-called 
Physae of Australia (P. Z. S. Lond., 1889, p. 136), Cooke, 
in a footnote, indicates that he considers the follow in g 
synonymous: proteus Sby., pyramidata Sby., dispar Sby., 
pectorosa Conrad, brevicidmen Smith, hadia Ad. and Angas, 
concinna Ad. and Angas, texturata Sby. 
Ameria tenuistriata (Sowerby) var. pyramidata (Sowerby). 
(PI. I, Fig. 13.) 
1873 Physa pyramidata Sowerby. Reeve, Conch. Icon., xix, pi. 8, fig. 62. . 
1882 Id. Tate and Brazier, Pr. Linn. Soc. N.S.W., vi, p. 557. 
1882 Id. Smith, Journ. Linn. Soc. Lond.. xvi, p. 282. 
1886 Id. Clessin, Conch. Cab., i, Abth., 17, p. 243. 
1920 Bullinus pyramidatus (Shy.). May, Pr. Roy. Soc. Tas., p. 70. 
1921 Ameria pyramidata (Shy.). May, Check-list Moll. Tas., p. 90. 
1923 Id. May, 111. Index Tas. Shells, pi. 41, fig. 14. 
1932 Id. Cotton and Godfrey, S. Aust. Nat., xiii. No. 4, p. 161, pi. 2, fig. 8. 
1933 Isidorella pyramidata (Sby.). Quick, Journ. Conch., xix. No. 10, 
p. 322, figs. 1-15 (in text). 
Size. — ^Length, 35 mm. ; breadth, 15 mm. 
Localities . — Meredith (Nat. Mus. Melb., and J. H. Young) ; 
Portland (C. J. Gabriel) ; Shelford (J. H. Young). 
Vernacular Name . — The Pyramidal Pond-Snail. 
Observations. — This, the largest of our Victorian sinistral 
Pond-Snails, is very variable, differing from the dominant 
form in being longer and with the earlier whorls more inflated. 
Hedley, in the Records of the Australian Museum, 1917, 
notes the suggestion of Cooke (P. Z. S. Lond., 1889) in 
uniting tenuistriatus and pyramidatus. May (1920) regards 
pyramidatus as worthy of specific rank and places the fol- 
