Fossil Fauna, Table Cape Beds, Tasmania. 133 



was drawn to this shell by the fact that a Table Cape specimen 

 had been so named in the collection of the Ballarat School of 

 Mines, and upon examination I found it to be identical with a 

 form in the Atkinson collection which I had regarded merely as 

 a youno- and well-preserved example of C. gracilicostata. Further, 

 upon going over the descriptions and figures of these two species 

 given by Professor Tate, their extreme closeness, if not absolute 

 identity, seems to be apparent. 



112. Capdita tasmanica, Tate. 

 Id., Tate, Lam. I., 1886, p. 154, pi. xii., fig. 13. 



113. Lucina planatella, Tate. 



Id., Tate, P.R.S.Tas., 1884, p. 229, and T.R.S.S.A., 1886, 

 pi. xii., fig. 11, and Lam. II., p. 146. 



114. Diplodonta subquadrata, Tate. 



Id., Tate, Lam. II., 1887, p. 147, pi. xiv., figs. lOa, \^b. 



Id., R. M. Johnston, Geo. Tas., p. 234, pi. xxxii., figs. 14, 14a. 



115. Cham a lame I life pa, T. Woods. 



Id., T. Woods, P.R.S.Tas., 1876, p. 114. 

 Id., Tate, Lam. II., 1887, p. 149, pi. xiv., tig. 5a, 5A 

 Observations. — Tenison Woods, in giving the dimensions of 

 this species, says : — " Largest specimens about lat. 24 by 22 and 

 18 mm. thick." Professor Tate states that they rarely exceed 

 twenty millimetres of diameter. Several examples in the present 

 collection do not conform to these dimensions, and a special 

 feature of the majority is the extreme thickening of the shell. 

 There are six examples above the dimensions given by Tenison 

 Woods, ranging for their antero-posterior diameter from 25 mm. 

 to 38 mm., and giving an average of a little over 30"5 mm., for 

 their dorso-ventral diameter from 22 mm. to 29 mm., or an 

 average of 25 mm., and in the thickness of the shell they run 

 from 2 mm. to 8 mm. 



116. Chamostpea albida, Lamarck. 



C. albida, Lamarck, Anim. Sans. Vert., vol. vi., p. 96, 1819. 

 C. crassa, Tate, P.R.S.Tas., 1884, p. 228. 



