so. A Molluscan Faunal List of the Lake of Tiberias, 
with Descriptions of new Species. 
By H. B. PREsToN. 
(Plate X XVII.) 
The following paper is the result of a request by Dr. N. 
Annandale to identify an extensive collection of mollusca re- 
cently collected by him in the Lake of Tiberias. giving at the 
same time a molluscan faunal list of the Lake with the geogra 
phical distribution of each species. 
The student of fluviatile and lacustrine mollusca willat once 
be struck by either the total absence or paucity in number of 
the thinner and more fragile genera, such as Limnea, Physa, 
Ancylus, Pisidium, etc., while the heavier, ‘‘ shelly ’’ forms 
such as Unio, Theodoxis, and Corbicula appear to be well repre- 
sented, a fact which is probably due to a surfeit of suspended 
mineral matter in the waters of the Lake. 
The species enumerated are given on the faith of the 
various authorities who have been consulted in the compilation 
of the list, but the author himself in no way vouches for their 
specific validity, as many of them (notably those of Messieurs 
Bourguignat and Lozard) have not been accessible to him. 
onclusion the author wishes to proffer hanks to 
his friends Mes ude C. Legassicke-Crespin, to 
he former for much useful bibliozraphical assist and t 
Family LIMNAIDAE. 
1. Limnza auricularia (Linné). 
Distribution: Northern Europe, Siberia; two specimens 
which I am unable to separate from this species were collected 
by Dr. Annandale at the north end of the Lake; | am unable 
to find any other record of its having been collected in the 
Syrian Lakes. 
[Those specimens were taken, with those of Physa tiberia- 
densis, in filamentous algae in a boat submerged in the R. Jordan 
at its entry into the lake.—N. Annandale.] 
