THE FRESHWATER MOLLUSCA OF VICTORIA 
105 
every little stream or pool has its own special variety, so 
that it is quite impossible and certainly unnecessary to 
enumerate all the modifications. In many localities the whorls 
are more or less sharply carinated, with sometimes the 
additional ornamentation of a line of interrupted pointed 
spines, but plain, carinated and spinose specimens are often 
found living in the same pool. The same peculiarity has been 
noticed in one or two of the New Zealand forms of the genus. 
In clear running streams, the shells are often substranslucent 
and of a pale yellowish horn colour, but in quiet still water 
they are usually coated with a thick covering of decaying 
vegetable matter, generally of a rusty brown colour.” 
Petterd’s remarks apply equally to Victorian forms, many 
specimens showing variation towards the varieties legran- 
diana Brazier and unicarinata Ten. Woods. W. L. May 
adopts this synonymy, and I agree with the conclusions of 
these Tasmanian workers. 
Bythinella huccinoides (Quoy and Gaimard). 
(PI. I, Pig. 4.) 
1835 Paludina huccinoides Q. and G., Zool. Astrolabe, iii, p. 175, pi. 58, 
figs. 13, 14. 
1858 Hydrobia tasmanica Von Martens, Weig. Arch. Nat. Sci., i, p. 185, 
pi. 5, fig. 12. 
1865 Amnicola diemense Frauenfeld, Verhandl. Zool. Bot. Ges. Wien, xv, 
p. 529, pi. 10, 2 figs. 
1875 Bythinia dulvertonensis Ten. Woods, Pr. Roy. Soc. Tas., p. 77. 
1878 Bithinia victoriae Ten. Woods, Pr. Roy. Soc. Viet., xiv, p. 65. 
1878 B^hinella victoriae Ten. Woods, Pr. Roy. Soc. Tas., p. 71. 
1882 Bithynia Dulvertonensis Ten. Woods. Tate and Brazier, Pr. Linn. 
Soc. N.S.W., vi, p. 563. 
1882 Hydrobia huccinoides Q. and G. Smith, Journ, Linn. Soc. Lond., 
Zool., xvi, p. 269. 
1882 H. victoriae Ten. Woods. Smith, op. cit., p. 270, pi. 7, fig. 20. 
1882 H. Angasi Smith, op. cit., p. 271, pi. 7, fig. 22. 
1888 Potamopyrgus woodsi Petterd, Pr. Roy. Soc. Tas., p. 71, pi. 1, fig. 12. 
1889 Amnicola diemense Frauen. Petterd, Pr. Roy. Soc. Tas., p. 81. 
1913 Littoridina diemensis Frauen. Hedley, Pr. Linn. Soc. N.S.W., 
xxxviii, Pt. 2, p. 284, pi. 17, fig. 52. 
1914 Bythinella nigra Q. and G. Chapman, Mem. Nat. Mus. Melb., No. 
5, p. 57. 
1917 Id., Chapman and Gabriel, Pr. Roy. Soc. Viet., xxx (n.s.), Pt. 1, p. 9. 
1920 Potamopyrgus woodsi Petterd. May, Pr. Roy. Soc. Tas., p. 73, 
pi. 12, fig. 29. 
1920 Bythinia dulvertonensis Ten. Woods. May, Pr. Roy. Soc., Tas., 
p. 72, pi. 12, fig. 28. 
1921 Potamopyrgus tasmanica Von Martens. May, Check-list Moll. 
Tas., p. 56, No. 503. 
Id., May, 111. Index Tas. Shells, pi. 26, fig. 4. 
1923 
