261 



NOTES ON THE POST-PLIOCENE MOLLUSCA OF THE 

 MYLNE COLLECTION. 



By A. S. Kennard, F.G.S., and B. B. Woodward, F.L.S. 



Read 8th March, 1907. 



A SMALL collectiou of Post-Pliocene MoUusca formed by the late 

 R. W. Mylne (whose Geological Map of London is so well known) 

 is preserved in the British Museum (Natural History), and we are 

 indebted to Dr. A. Smith Woodward for the opportunity of examining 

 these specimens. Unfortunately, though all the examples are localized, 

 and there is no difficulty in determining their age, we have been 

 unable to trace details of some of the sections from which they were 

 obtained. 



The collection consists of three series from Shoeburyness, an 

 extremely interesting set from St. James's Square, two series from 

 Spring Gardens, Charing Cross, and a good number of species from 

 Menchecourt and St. Acheul. 



(1) " Shoeburyness Boring." 



Bithynia tentaculata (Linn.). Corbicula Jluminalis (Miill.). 



Fahidestrina ventrosa (Mont.). Cardiuni edule, Linn. 



(2) "Blue mud, Boring B, Shoeburyness." 

 Paludestrina ventrosa (Mont.). Cardium edule, Linn. 



(3) "Parsons Long Field, Shoeburyness; 14 feet mud with shells, 

 bottom 3 feet mud and shells." 



Paludestrina ventrosa (Mont.). Cardium edule, Linn. 



Corbicula Jluminalis (Miill.). 



These three series are evidently from the same deposit, and are 

 undoubtedly of Pleistocene age. The examples of Corhicula jluminalis 

 are small, and many of the examples still retain their periostracum. 

 The brackish- water conditions as shown by the presence of Cardium 

 edule may probably account for the dwarfing. Paludestrina ventrosa 

 was not uncommon, and the examples are very similar to those found 

 at Grays, but are rather smaller. The other species call for no 

 comment. 



*' Spring Gardens, Charing Cross " : TJnio littoralis, Lamarck. 



There can be no doubt that this example was obtained from the 

 same beds that yielded to W. J. Lewis Abbott so varied a fauna.' 



W. J. Lewis Abbott: "The Section exposed in the Foundations of the new 

 Admiralty Offices," vol. xii (1892), pp. 346-356. 



