208 



THE GEOLOGIST. 



KOTICE OF THE FOSSIL REMAINS OF A NEW FRESH- 

 WATER MOLLUSC FROM THE LOWER LONDON 

 TERTIARIES. 



By F. E. Edwaeds, F.G.S. 



In making tlie excavations now in progress for tlie formation 

 of the great Soutli High Level Sewer in the neighbourhood of Peck- 

 ham and Dulwich, the works have been carried throngh 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 Mr. Charles Rickman, the able and zealous curator of 

 the Lambeth Museum of Natural History, who has laboured assi- 

 duously in collecting the fossil remains found in them, these deposits 

 at Dulwich, at the depth of twenty-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 

 Ostrece, a band of hard compact sandstone, very slightly calcareous, ap- 

 parently identical with that at Lee, referred to by JVIr. De la Conda- 

 mine as known there by the name of the " cockle." They contain re- 

 mains of Ostrea tenera (Sow.), 0. pulcJira (Sow.), 0. JBeUovacina 

 (Lamk.), 0. elejpJiantopus ? (Sow.), a 5?/s50-a)'C(X somewhat resembhng 

 Area (Bysso-arca) Gailliaudi (Bell.) from the Nummulitic beds of Nice, 

 Cyrena cuneiformis (Fer.), G. deperdita (Sow.), G. cordata (Morris), 

 a new species of Gyrena, which has been named by Mr. Rickman 

 G. Bulivichiensis, Modiola Mitchelli (Morr.) ?, a Unio closely re- 

 sembling, if not identical with, Unio Solandri (Sow.), another un- 

 described species of Unio, Gerithium funatum (Mant.), Melanatria, 

 melanoides (Sow.), more generally knoT\Ti as Melania inqidnata (Dif.), 

 Galyptroea trocJiiformis (Lamk.), a lai'ge and undetermined species of 

 Teredina (?), Paludina lenta (Sol.), another large species of Paludina, 

 much like Paludina aspcm* (Michaud), from the freshwater lime- 



* This is probably the species recorded by Mr. De la Condamine as P. Des- 

 noyersi (Dcsh.) ; that species, however, appears to be more globose than the Dul- 

 wich shells. 



