15 
MEETING ON 5th NOVEMBER, 1869. 
The monthly meeting was held in the Glovers’ 
HaU on the evening of Friday, the 5th November, 
1869—the President, Dr Buchanan White, in the 
chair. One gentleman was balloted for, and 
elected a member. A number of shells of the 
Anadonia cygnea, comprising the type, and the 
variety incrCLSsata, were exhibited and presented to 
the Museum. These shells had been found in the 
Earn, near the railway bridge at Hilton, and opened 
along with the pearl mussel Unio margaritifer in 
search of pearls. They do not bear pearls of any 
value, and the shell is quite distinct from the pearl 
mussel, being broader, and of an olive green colour 
The existence of this shell in the locality was un¬ 
known until now. The thanks of the meeting were 
given to Mr Herd, the donor, and also to Mr Sim, 
for the whole numbers of the “ Naturalist ” presented 
by him to the Society. 
Mr John Dawson then read the following paper on 
“Shells of the Genus Helix found in 
Perthshire ”:— 
Of all our land shells the Helices are the most 
abundant. There exist throughout the globe more 
than two thousand species, and in Britain of the 
genus proper we have 24 species, forming more than 
a third of the land snails of the country. It is 
natural, therefore, that such a large group, so charac¬ 
teristic and so readily met with, should form the first 
study of the conchologist. 
Without entering into any minute description of 
the forms and habits of the animals—with which in¬ 
formation, happily, our library is well provided—it 
will be sufiicient to give a very short account of the 
species hitherto met with in the county, and the 
stations for them. It is proposed to classify them 
according to Mr Jeffreys, the chief li\dng authority, 
but before doing so, reference may be made to the 
shell Zonites fulvv.s, which has been so named by 
Jeffreys, but classed as a Helix by other authors. 
This snail seems to form the connecting link between 
