356 scharff: on a hybrid rumina decollata. 



acquainted with to this is H. Bassi Brazier, from Tasmania, 

 from which it differs in its much larger size, depression of 

 the upper portion of tRe body whorl, and the peculiar um- 

 bilicus, which is very characteristic and which separates it 

 from all other Australian species. 



3. Helix Otwayensis, n. sp. 



Shell small, imperforate, thin, orbicularly-depressed, 

 fawn-color, finely and closely ribbed throughout, interstices 

 minutely decussate; spire flat, apex smooth; whorls 5)^ 

 convex, striae as above, aperture ovately-lunate, margins 

 distant, joined by a thin, shining callus, columellar margin 

 slightly thickened, peristome simple. 



Diam., greatest 2, least i^ ; height i, mill. 

 Habitat — Cape Otway, Victoria. 



A pretty little shell resembling H. littmla Cox, from 

 Tasmania, and fl. sericatula, Pfr. from New South Wales. 



The above species are very interesting, as they add to 

 our knowledge of the least known portion of Australia, as 

 far as the land molluscan fauna is concerned. Possibly many 

 more species will be discovered in the dense brushes and 

 mountain ranges. 



NOTES ON A HYBRID RUMINA DECOLLATA. 

 By ROBERT SCHARFF. 

 In the transactions of the ^' Societe Linneenne" of Bordeaux, 

 M. Gassies gives an account of his latest researches on a hybrid of 

 Rumina decollata (B. decollatus.) 



As the result of these studies will be interesting to con- 

 chologists, I take the liberty of giving a few extracts from his 

 elaborate paper on this subject : — 



"In 1875, a friend of mine presented me with a few 



