3o8 BIBLIOGRAPHY OF 1 87 7. 



makes its passage to the southern variety Lticensis by means of 

 the var. interposita ; and 6. I'he occurrence oi Buliminus detritus 

 in the Baganza valley. 



The third part of the paper is devoted to a similar contrast 

 of the faunas of the plains and the mountains, beginning with a 

 list of the species of the plain, then including a list of erroneously 

 recorded species, and a list of species probable to occur on the 

 plains. The author concludes that the facts tend to confirm the 

 law of distribution, that the terrestrial species present themselves 

 in greatest abundance on the hills and low mountains, and that 

 inversely the aquatic species predominate above all in the 

 region of the lakes. So, the plains of the district spoken 

 of do not present that abundance of aquatic species found 

 in the irrigated Lombardo- Venetian plains and at the foots of the 

 Piedmontese and Lombard Alps, abounding in lakes. Part 4 is 

 in the form of table showing the distribution of the mollusca in 

 the plains, the hills, the mountains, and the Alpine regions, the 

 numbers for each being respectively 44, 66, 72 and 23. The 

 paper concludes with a discussion of Dr. Kobelt's views as to 

 the geographical regions into which Europe is divisible, and as 

 to the species characteristic of the region under consideration. 



Taylor (John W.) — Notes on Swiss Mollusca, &.C. — 



Nat., Oct. 1877, iii., 34 1039. 



The localities referred to are Basle, Schaffhausen, Zurich, 

 Fluellen and Altorf, the Righi, the lake Brienz, the Brunig Pass, 

 Interlaken, Lauterbrunnen, the Lake Thun, the Gemmi Pass and 

 Chamounix, numerous species of land mollusca being noticed. 



Tristram (Rev. Canon H. B., F.R.S.) — Introduction of 

 Foreign Land and Freshwater Mollusca. — Zool, June 

 1877, 3rd series, i. 260- i 



J.C, ii., Oct., 1879 



