BY W. F. PETTERD. 67 



M, rounded Avith a moderate satural impression ; spire very 

 short and small, pointed, acute ; aperture ovate, columellar 

 arc'liod and a little reflexed near the umbilical region ; fold 

 small and inconspicuous ; labrum very thin, acute. 

 Lenr/fli, 7. Jireadfh, 5^ mill. 



Animal, pale bluish white ; head very broad ; tentacles 

 short, flattened, of a pale milky white ; muzzle expanded. 

 Plate III. Fig. 9 and 12. 



Hahifaf — South Esk River, near Launceston. 



This specie differs very much in form from its nearest 

 congener L. snhaqnatilis rar. negleda, both in the outline of 

 the shell and animal. It lives in clear, gently flowing water, 

 attached to the submerged rocks about which it smoothly 

 glides without any of the jerky motion so characteristic of 

 neglect a. 



The animal at once separates it from AmpMpeplea 

 Launcestonensis, and from the introduced L. pererjra, it may 

 be known by its smaller size, form and texture of the shell. 

 The L. ampulla, Hutton, from Hasterton, New Zealand, is 

 nearly the same in size and form, but quite specifically 

 distinct. 



LiMNCEA LUTOSA. 11. sp. 



Limncea Tasvianica mihi. M.S. 



Plate II. Fig. 13. 



Shell, narro:/ly ovate, pointed above, brown-horn, dull; 

 Wliorls 5, flatly convex, coarsely marked with lines of growth, 

 spire turreted, apex acute ; body whorl elongated ; aj^erture 

 ovately pyriform about two-thirds of the total length of the 

 shell ; Columella almost straight, flattish and reflexed, with a 

 thick shining, arched deposit of callus which forms a false 

 but minute umbilicus. 



Animal ? 

 Length, 12. JSreadth, 6 mill. 



Habitat — Brighton, River Jordan {Byer). 



A shell with much the appearance of L. Victoria', from 

 Barnsdale, Victoria, but more acute in form, and almost 

 subperforate. From the other Tasmanian species it is widely 

 different. I have several examples in my collection and all 

 are constant in form. 



Planorbis meridionalis Brazier. 



Plate I. Figs. 4, 5, and 6. 



Planorbis meridionalis, Brazier. Pro. Linn. Soc, N.S. 

 Wales. P 20, 1875. 



