TO A REVISED CENSUS OF THE TASMANIAN FLUVIATILE MOLLUSCA, 



13. pyramidatus, Sower by, Physa, Conch. Icon, f. 62. 



Smith, Journ. Linn. Soc. XVI., 1881, p. 282, pi. 6, 



f. 17. 



= eburnea, Sowerby, op. cit. f. S9. 



= attenuata, Sowerby, op. cit. f. 94. 



= bruniensi§, Sowerby, op. cit. f. 99, juvenile. 



= lmonemis, Ten. Woods, Pro. Roy. Soc. Tasm. for 

 1875, p. 74. 



= legrandi } Ten. Woods, op. cit. PI. IX., f. 7. 



= tasmanica, Ten. Woods, op. cit. PI. IX., f. 8. 



= lasmanicola, Ten. Woods, op. cit. p. 75, juvenile. 

 PI. IX., f. 9. 



= 1 huonicola, Ten. Woods, op. cit. 

 Johnston, P. and P. Roy. Soc. Tas., 1890, p. 145. 



The common and variable form, universally distribut- 

 ed, differing greatly in colour, size, and length of spire. 

 The type of pyramidatus, was from Flinders Island, and 

 Smith's figure agrees fairly well with our ordinary speci- 

 mens as ebumea and tasmanica; bruniensis, and 

 tasmanicola, I consider undoubtedly juvenile, attenuate/, 

 may possibly be a variant of mamillatus. 



Family Planorbidice. 

 Planorbis, Geoffroy, Traite, Coq. 1767, p. 12. 



14. ath'nso'ni, Johnston, P. and P. Roy. Soc. Tas., 1878, p. 



26. Petterd, op, cit, for 1888, p. 68, pi. 2, f. 6-7. 

 Whorls more rapidly increasing, and more strongly 

 keeled, than the next, but closely allied. Hab, South 

 Esk River, from Avoca to Launceston. PI. X., f. 10. 



15. meridionalis, Brazier, P.L.S. N.S.W., 1875. Petterd, 



P. and P. Roy. Soc, Tas., 1888, p. 67, PI. 1, f. 4-6. 

 Hab. Upper Ouse River, type; Great Lake. PL X., 

 f. 11. 



16. scottiana, Johnston, P. and P. Rov. Soc. Tas,, 1878, 



p. 26. op. cit, for 1888. pi. 6, f. 2 "a.b.c. Hab. South 

 Esk River. Very distinct from our other species. 

 PI. X., f. 12. 



17. tasmanicus, Ten. Woods, P. and P. Roy. Sec, Tas,, 



1875, p. 79. Petterd, op, cit. n. 68, pi. 2, f. 8-9. Hab. 

 Swamps at Circular Head. PI. X., f. 13, 14. 

 Segmentina, Flemming, Hist. Brit, Animals, 1838, p. 279. 



18. victoria, Smith, Journ. Linn. Soc, XVI, 1881, p. 



296, pi. 7, f. 11-13. Mav, P. and P. Roy. Soc. Tas. 

 1919, p. 69. Hab. Lake Tiberias. 



