Entomological Society. 4419 



six parts of water, a cooling mixture is made : over this I placed a 

 piece of metallic foil touching the fluid, and upon this laid Z. alliarius : 

 in a very few seconds the pulse began to decrease, until there were 

 only about 30 beats per minute, and these very weak. 



It does not require any very close investigation to make these ob- 

 servations, since the beating of the pulse of Z. alliarius is quite evi- 

 dent to the naked eye at the under side of the shell, on account of its 

 transparency, and with a small pocket lens it is very distinct. 



Where, in Nature, can we find more marvellous results than these ? 

 for by merely increasing the temperature a few degrees, we have the 

 pulse increased to a feverish speed, and by reducing the heat in the 

 same degree there is almost a cessation of its action. The problem 

 of how mollusks exist during their hybernation is solved at once, and 

 in a most satisfactory manner. 



J. W. Watson. 



Flounders Institute, Ack worth, near Pontefract, 

 June 26, 1854. 



Proceedings of Societies. 

 Entomological Society. 

 July 3, 1854. — Edward Newman, Esq., President, in the chair. 



Donations. 



The following donations were announced, and thanks ordered to be given to the 

 donors: — The 'Zoologist' for July ; by the Editor. The 'Athenaeum' for June ; by 

 the Editor. The ' Literary Gazette' for June; by the Editor. The ' Journal of the 

 Society of Arts' for June; by the Society. ' The Natural History Review,' No. 2; 

 by the Editor. ' Monographia Cassididarum,' auctore C. H. Boheman, Holmiae, 

 1854; by the Author. ' Hewitson's Exotic Butterflies,' Part 11 ; by W. W. Saun- 

 ders, Esq. ' Bibliotheca Historico-Naturalis,' 3 Jahrgang, 1 Heft, 1853; by the 

 Author, Ernst A. Zuchold. Fifty specimens of British Lepidoptera; by T. H. 

 All is, Esq. 



Exhibitions. 



Mr. Stevens exhibited a living full-grown larva of Notodonta Carmelita, reared 

 from the egg; a specimen of Pyrochroa pectinicornis, a new British beetle, taken by 

 Mr. Buxton, in Scotland ; and Damaster Blaptoides, Koll., from Japan, of which only 

 four specimens were known in Europe. 



Mr. Waring exhibited several insects, found dead and covered with a tough film, 

 apparently of a fungoid nature. 



