PROCEEDINGS OF SOCIETIES. 
163 
Dr. Carte also exhibited a beautifully preserved specimen of the Globe Fish 
(Tetraodon lineatus), which belonged to the same family, and, along with some 
serpents and other things, was forwarded from Alexandria, through Mr. Wright, 
by the Rev. Dr. Philip, one of the corresponding members of this Association. 
Dr. Ball said that a mutilated specimen of File-fish exjsts in the University col¬ 
lection ; as it was found in a case with some rare specimens, known to have been 
obtained in Wexford, towards the close of the last century, it probably was also 
obtained there. 
After some conversation, in which Lord Talbot de Malahide, Mr. Waller, Mr. 
Eyton, Drs. Ball and Allman took a part, Mr. Hogan read the following paper, by 
R. H. S. Smith, Esq., corresponding member :— 
LIST OF LAND AND FRESH-WATER MOLLUSCA FROM THE NEIGHBOURHOOD OF 
SEVENOAKS, KENT. 
The district to which the following list refers, is about twenty-four miles south¬ 
east of London, in the neighbourhood of Sevenoaks, Kent. Geologically, it lies in 
part on the southern aspect of the lower chalk formation, where the latter unites 
with the weald clay, and thus exhibits some variety of soil, including chalk, chalk- 
marl, green sand, ironstone, plastic, and other clay; but the dry nature of most of 
the localities in the immediate neighbourhood is unfavourable to many of our 
mollusca, and but few species are present in any considerable number. 
The small river Darent runs at a distance of about two miles, and some ditches 
near it have afforded me several kinds; a few others have been obtained from a 
wider range. The nomenclature is that of Gray’s Turton. 
Bithinia tentaculata. In the Darent and ditches near it; frequent. 
,, vcntriccsa. In the Medway, near Maidstone. 
Yalvata piscinalis. The Darent; not abundant. 
„ cristata. Do. ; rare. 
Arion ater. Common. 
,, hortensis. Not so frequent. 
Limax maximus. Common. 
,, agrestis. Do. 
Yitrina pellucida. Frequent. I have found one specimen considerably larger than 
ordinary, not transparent, and exhibiting a pearly lustre inside. The animal 
has the power of producing a fine thread, by which it can suspend itself. 
Helix aspersa. Common. 
,, hortensis. Abundant; varying much in colour and markings ; but no spe¬ 
cimens have been obtained by me that seem to ally it to nemoralis, though 
Forbes and Hanley have united the two. The white peristome, more 
glossy surface, and less solid character of the shell, as well as its smaller 
size, mark it, in this neighbourhood, very distinctly. H. hybrida, which 
is assumed to be the connecting link between the two, has not yet re¬ 
warded my search here. 
,, nemoralis. Frequent, especially near the chalk; varying as usual in tint 
and bands, but the dark lip well marked, its colour continued across, and 
for some distance within the mouth, upon the pillar. 
,, Pomatia. On the chalk; frequent. 
,, arbustorum. Local, and not common. 
,, lapicida. Rather frequent, especially on the chalk. 
,, pulchella. Well diffused, and plentiful in some localities. The var. costata 
is also found. 
,, Cantiana. Yery common. 
,, fulva. Not uncommon, though rather local. 
,, aculeata. Ditto, do. 
„ sericea. Scarce. 
,, hispida. Abundant; varying in colour and the elevation of the spire, but 
well distinguished by its thick, yellowish-white foot. 
,, eoncinna. Although regarded by good authorities as a variety of hispida, yet, 
after examining many specimens which I have collected in various 
