208 
THE GEOLOGIST. 
NOTICE OF THE FOSSIL RE?»IAINS OF A NEW FRESH- 
WATER MOLLUSC FROM THE LOWER LONDON 
TERTIARIES. 
By F. E. Edwards, F.G.S. 
In making the excavations now in progress for tlie formation 
of the great South High Level Sewer in the neighbourhood of Peck- 
ham and Dulwich, the works have been carried through a series of 
deposits, constituting part of the lower London Tertiaries, and dis- 
tinguished by Mr. Prestwich as the " Woolwich and Reading series." 
As I learn from Jlr. Charles Rickman, the able and zealous curator of 
the Lambeth Museum of Natural Histoiy, who has laboured assi- 
duously in collecting the fossil remains found in them, these deposits 
at Dulwich, at the depth of iwenty-five feet from the surface, com- 
prise a bed of grey sand, and below this, at a depth of about forty 
feet, and intercalating a bed of clay containing shells and a bed of 
OstrecB, a band of hard compact sandstone, very slightly calcareous, ap- 
parently identical with that at Lee, referred to by Mr. De la Conda- 
mine as known there by the name of the " cockle." They contain re- 
mains of Osfrea tenera (Sow.), 0. j)vlchra (Sow.), 0. Bellovacina 
(Lamk.), 0. elepliantopus (Sow.), a J5!/sso-aj'ca somewhat resembling 
Area (Bysso-arca) CailUaudi (Bell.) from the Nummuhtic beds of Nice, 
Cyrena cuneiformis (Fer.), C. deperdita (Sow.), C. cordata (Morris), 
a new species of Cyrena, which has been named by Mr. Rickman 
C. Dulwichiensis, Modiola Mitchelli (Morr.) ?, a TInio closely re- 
sembling, if not identical with, TTnio Solandri (Sow.), another un- 
described species of Unio, Cerithium funatvm (Mant.), Melanatria 
melanoides (Sow.), more generally known as Melania inquinata (Dif.), 
Calyptroea trochiformis (Lamk.), a large and undetermined species of 
Terediua (?), Paludina lenta (Sol.), another large species of Paludina, 
much like Paludina aspera* (Michaud), from the freshwater lime- 
* This is probably the species recorded by Mr. De la Condamine as P. Des- 
rwyersi (Desh.) ; that species, however, appears to be more globose than the Dul- 
wich shells. 
