136 



Our localities are a stream at Radford Grove, Bui- 

 well bogs, the River Leen at Bulwell (rare), and a di ch 

 at Lenton (rare). 



Further removed, at Bristol (Miller), Lackbam, in 

 Wiltshire (Montagu), Essex (Sheppard), Isle of Pur- 

 beck, near Wareham, and Charmouth, Dorsetshire 

 (MoQtagu), Spetisbury, Dorsetshire (Rackett), London 

 (Alder), Norwich (Bridgman), River Waveney, near 

 Shotford Bridge, Northamptonshire (Bloxara), River 

 Eythrope, at Stone, Buckinghamshire (Reade), Scar- 

 borough (Bean), Ly tham (The Author), Kendal (Gough), 

 Newcastle (Alder), Edinburgh, and Cupar, Fifeshire 

 (Fleming), Isle of Man (Forbes), Ireland (Thompson). 



On the continent, in Germany (Pfeiffer), and in Swe- 

 den (Nilson). 



Found fossil in the mammaliferous crag of the valley 

 of the Thames (Morris). 



Planorbis nitidus [The Fountain Coil Shell]. 

 Lhmccus. 



Figures 101 and 102. 



iOl. 102 



A highly polished, smooth, pellucid, thin, fragile, 

 amber-coloured shell, which was described by Light- 

 foot, in the year 1686, in the "Phil. Trans." There are 

 four convolutions, the body whorl very large in compa- 

 rison to the preceding one. Upper disc very convex, 

 lower disc flat. Umbilicated. Aperture of the form of 

 the bead of an arrow. Shell depressed. 



Diameter two lines and a half. 



Animal nearly black. 



An abundant shell in clear stagnant water on aquatic 

 vegetation. 



