THE YOUNG NATURALIST. 



43 



Cyclas Bristovii 

 Cyrena semistriata 

 „ transversa 

 Fusus Edwardsii 

 Melania fasciata 



Natica labellata 

 Neritina planulata 



„ tristis 

 Nematura parvula 

 Puludina lenta 

 Panopoaeo minor 

 Planorbis ellipticus 



Forbesii 

 inflata 



muricata or Forbesii 

 turritissima 



lens 



obtusus 



platystoma 



Melanopsis carinata 

 „ subcarinata 

 „ subulata 

 Murex Forbesii 

 Modiola Prestwichii 



Unio Austenii 

 Gibbsii 

 Yoluta Rathieri 



Bembridge Series. 



Following the Hempstead Series are the Bembridge, taking their name 

 from Bembridge. a parish on the eastern side (near Brading) of the Isle of 

 Wight. They consist of a series of marls, clays, and limestones, and may be 

 divided into four sub-divisions, viz. : — 



The first of these sub-divisions consist of a considerable thickness of marls 

 and liminated grey clays, the later prevailing westward. The best localities 

 for examining them are in Whitecliff Bay, and on the shore at Thornes, west 

 of Cowes. 



The second sub-division consists of unfossiliferous mottled clays, alternate, 

 with fossiliferous laminated clays, and marls, best seen by St. Helen's and 

 Brading Harbour, near Bembridge. 



The third group is of least extent of all four, forming a narrow but con- 

 stant band between the marls and the limestones. Its importance depends 

 on the evidence influx of salt water, during the deposition, as marked by 

 marine shells of various genera. This bed is best seen at Whitecliff Bay and 

 St. Helens. 



The fourth group includes the limestones of the series, often confounded 

 with the fresh- water limestones of the Headon series. 



Taking the limestones first, we find them a well developed series, occuring 



Upper Bembridge marl. 

 Lower Bembridge marl. 

 Bembridge Oyster bed. 

 Bembridge Limestone. 



