219 



grounds for expecting that true coal measures may be met 

 with below, though at an unknown depth. If, on the other 

 hand, I am right in classing our Southern marine formations 

 with the lower marine beds of New South Wales, the 

 probability is that no coal will be found underneath them, 

 and I am inclined to think that their thickness is to be 

 measured by thousands rather than hundreds of feet. 



The Minister of Lands (the Hon. N, J. Brown) has kindly 

 promised to present to the Museum a complete series of 

 specimens obtained from the borings at Tarleton, and the 

 Cascades, when the whole question can be more fully 

 discussed. 



DESCRIPTION OF A NEW SPECIES OF VITEINA 



FROM THE TRAVERTIN BEDS, GEILSTON. 



By Robt. M. Johnston, F.L.S., Etc. 



[JEtead June 9, 1884.] 



YiTEINA BaRNAEDII {u. S.). 



Shell minute, depressed, auriform ; whorls 2\, rapidly 

 increasing ; surface irregularly rugosely striate towards 

 peristome ; peristome simple, right margin slightly dilated 

 forward ; columella concealed, but, evidently, resembles the 

 living V. Verreauxi in this as in other general characteristics. 

 Greatest dia., 8mil. ; least, 5|mil. ; depth, 3mil. Travertin 

 Beds, G-eilston (one specimen). 



The above fossil shell differs from V. Verreauxi in being 

 much smaller and in being more depressed. The whorls, 

 relatively, increase more rapidly, and the surface markings 

 are more rugose. It is associated with Helix Tasmaniensis, 

 H. Huxley ana, H. Geilstonensis, H. Sinclair i, and Bulimus 

 Gunnii in the lower beds of the Travertin. 



I have named this shell in honour of our worthy vice- 

 president, Mr. Barnard, who, for many long years, has taken 

 a most active interest in all matters relating to the progress 

 of the natural history of this island. 



It is somewhat singular that remains of freshwater shells 

 should not have been discovered hitherto in these freshwater 

 deposits. It would seem that the waters, during the time the 

 lower Travertin beds were being formed, were unfavourable 

 to animal life* ; and that the remains of land animals, found 

 hitherto in such abundance, were carried to their present 

 position by a stream draining the land slopes in the imme- 

 diate neighbourhood. 



*See "Discovery of Entomostraca in the upper members," in following paper, as 

 proof that the upper members of the deposit were at least favourable to the life 

 of a species of cypris. R. M. J. 



