THE FRESHWATER MOLLUSCA OF VICTORIA 
113 
lowing Tasmanian forms in synonymy: eburnea Sby., atten- 
uata Sby., briiniensis Sby., huonensis Ten. Woods, legrandi 
Ten. Woods, tasmanica Ten. Woods, tasmanicola Ten. Woods, 
? Imonicola Ten. Woods. 
The anatomy of the animal is described by Dr. H. E. Quick, 
who also gives an interesting account of his aquarium 
observations. 
Ameria tenuistriata (Sowerby) var. waterJiousei (Clessin). 
(PL I, Fig. 14.) 
1886 Physa waterhousei Clessin, Conch. Cab., i, Abth. 17, p. 361, pi. 51, 
fig- 6. 
1917 Bullinus tenuistriatus (Sby.) Hedley, Rec. Aust. Mus., xii. No. 1, 
p. 3, pi. 1, figs. 7, 8. 
Size. — Length, 20 mm. ; breadth, 11 mm. 
Localities. — Murray R. (W. Kershaw) ; Gunbower, Wim- 
mera R. (Cox. coll.) ; Mordialloc (E. H. Matthews) ; Port- 
land ( W. H. Dillon) ; Lake Boga ; Caulfield. 
Vernacular Name. — Waterhouse’s Pond-Snail. 
Observations. — A form vdth much rounded whorls ; it may 
be compared with pyramidata Sby., which, however, has a 
much longer spire. The accompanying illustrations will serve 
to show that this variety is much more inflated than the 
tjqiical form. 
Ameria tenuistriata (Sowerby) var. araclinoidca (Tenisou 
Woods.) 
(PI. II, Fig. 15.) 
1878 Physa arachnoidea Ten. Woods, Tr. Roy. Soc. Viet., xiv, p. 63. 
1882 Aplexa arachnoidea (Ten. Woods) Tate, Tr. Roy. Soc. S. Aust., 
iv, p. 76. 
1882 Physa arachnoidea Ten. Woods. Tate and Brazier, Pr. Linn. Soc. 
N.S.W., vi, p. 556. 
1882 Id. Smith, Journ. Linn. Soc. Lond., Zool., xvi, p. 289. 
1885 Id. Clessin. Conch. Cab., i, Abth, 17, p. 359. 
1917 Bullinus tenuistriatus (Sby.) var. arachnoideus (Ten. Woods). 
Hedley, Rec. Aust. Mus., xii. No. 1, p. 3, pi. 2, fig. 15. 
Size of Type. — ^Length, 12 mm. ; breadth 5 5 mm. Aperture 
length, 7 mm; breadth, 3 5 mm. 
Localities. — Mordialloc (Nat. Mus. Melb) ; Castlemaine 
(F. L. Billinghurst) ; Gardner’s Creek (Dr. Cherry) ; Echuca 
(Cox coll.) ; Overland Corner (F. H. Taylor) ; Dimboola (J. 
Mulder) ; Werribee R. ; Merri Creek; Williamstown. 
Vernacular Name. — The Spider-web Pond-Snail. 
