25 
MOLLUSCA. 
_ There are no new species in this year’s list of Mollusca, but as this list is 
so very nearly perfect, we should hardly have expected any. But the speci- 
ns in the collection are not so numerous—in tact, there are only 16 sorts, 
ough some are rare, and most of them hard to find, being very small. Our 
nks for the specimens, as well as for the list itself, are due to F. Podmore: 
As in most of the other lists, those of which there are specimens are marked 
with an asterisk. 
(Named from Jeffreys’s British Conchology). 
CONCHIFERA. 
Spherium Corneum River Lea 
ce Rivicola River Lea 
‘y Lacustre Amwell 
Pisidium Amnicum Amwell 
. Nitidum Amwell ‘ 
nio Pictorum River Lea 
Anodonta Cygnea River Lea 
,,  Anatina River Lea 
GASTEROPODA—PECTINIBRANCHIATA. 
itina Fluviatilis Rye House 
ludina Vivipara River Lea 
sythinia Tentaculata River Lea 
5,  Leachii Amwell 
Valvata Piscinalis Amwell 
» ~~ Cristata St. Margaret’s 
GASTEROPODA—-PULMONOBRANCHIATA. 
orbis Nautileus Near Hertford 
Albus St. Margarets 
Glaber St. Margarets 
Spirorbis Amwell 
ortex Amwell 
Carinatus Amwell 
~ Complanatus ‘ Amwell 
Corneus Amwell 
contortus Amwell 
Hypnorum + St. Margarets 
Fontinalis St. Margarets 
+ One specimen dead. 
