262 PROCEEDINGS OF THE MALACOLOGIOAL SOCIETY. 



" Shells from the sands in St. James's Square." 



Helicella itala (Linn.). PL spirorbis (Linn.). 



Hygromia hispida (Linn.). Bithynia tentaciilata (Linn.). 



Succinea oblong a, Drap. Valvata piscinalis (MiilL). 



Limncea palustris (Miill.). Pisidium amnicum (MiilL). 



L. pereger (Miill.). P. siipinum, A. Schniidt. 

 Planorbis wribilicatus (MiilL). 



This is an extremely interesting series from a Pleistocene deposit 

 which belongs either to the third or the fourth terrace, and in all 

 probability to the latter, and is of the same age as the beds at Spring 

 Gardens. Succinea oblonga was fairly common, and the examples are 

 often large ; in fact, they are the finest we have seen from any deposit 

 in these Islands. The specimens of Linmaa palustris are rather small 

 and slender, in marked contrast with the extremely fine specimens 

 found at Spring Gardens. Pisidium supinum is an extremely 

 interesting shell which we have evidence was living in the Thames 

 Yalley down to a very recent period. 



"Spring Gardens, Charing Cross." 



Limncea pereger (MiilL). Neritinajluviatilis (Linn.). 



Planorbis carinatus, Miill. SphcBrium rivicola (Leacli). 



PI. Stroemii, West. Sph. cornemn (Linn.). 



Bithynia tentaciilata (Linn.). Pisidium amniciim (MiilL). 



Valvata piscinalis (Miill.). Unio tumidus, Retz. 



"Without doubt these shells came from a sandy bed of probably 

 early Holocene age. An account of the Holocene beds at Spring 

 Gardens has been given by Mr. Abbott.^ Of these shells the most 

 noteworthy is Sphceriutn rivicola, which is extremely rare in a fossil 

 state in both the Holocene and Pleistocene. Planorhis Stroemii is 

 another noteworthy species. It was not found by Mr. Abbott and 

 did not occur at the New AVar Ofiice, but was not uncommon at the 

 Houses of Parliament and the New Scotland Yard. 



" Base of sands, Menchecourt." 



Jaminiamuscoriiin (Linn.). PI. carinatus, Miill. 



Vallonia pulchella (MiilL). PI. albiis, MiUl. 



Hygromia hispida (Linn.). Bithynia tentaciilata (Linn.). 



Limncea pereger (MiilL). Valvata piscinalis (MiilL). 



Planorbis umbilicatus, MiUl. Pisidium amnicum (MiilL). 



*' White sands, Menchecourt." 

 Vallonia pulchella (MiilL). Planorbis spirorbis (Linn.). 



Hygromia hispida (Linn.). Bithynia tentaculata (Linn.). 



Jaminia muscornm (Liun.). Pisidium amnicum (MiilL). 



Limncea pereger (MiilL). 



"Loess, Menchecourt." 



Vitrea nitidula (Drap.). Limncea pereger (MiilL). 



Hygromia hispida (Liun.). Planorbis carinatus, MiUl. 



Clausilia bidcntata (Strom.). Pisidium amnicum (Linn.). 



Loc. c-it.. 



