60 



Westward of this section is a brickyard disclosing a surface 

 of clay from which 5 or G feet of gravel have been removed. The 

 top 2 or 3 feet of this clay are yellowish in colour and contain a 

 few stones and pebbles, so that it may be the base of the 

 Boulder Clay, the old river having here nearly, but not quite, 

 cut down to the Kimmeridge Clay below the plain of Boulder 

 Clay. 



[This section is the same as that numbered 96 in the 

 Appendix to Skertchly's Geology of the Fenland.] 



Below is a full list of the fauna hitherto collected, 40 species 

 in all. 



Buccinum undatum. 

 Purpura lapillua. 

 Trophon scalarifonnis. 



„ Bamfius. 

 Bela turricula. 



„ pyramidalis. 

 Mangel ia rvifa. 

 Aporrhais pes pelicani. 

 Turritella communis. 

 Scalaria communis. 

 Littorina littorea. 



* „ rudis. 

 Lacuna vincta, 



* „ crassior. 

 *Hydrobia ulva. 



Natica Alderi. 

 „ helicoides. 



* ,, catena. 

 Trochus cinerarius. 



t „ helicinus. 



* On the 

 t On the 



Cyrena fluminalis. 



Ostrea edulis. 



Mytilus edulis. 



Tellina solidula. 

 f ,, lata. 



Scrobicularia plana. 



Cardium edule. 



Astarte borealis. 

 ,, sulcata. 

 *Modiola modiolus. 



* Artemis exoleta. 

 Cyprina islandica. 

 Mactra ovalis. 



,, solida. 

 Corbula striata. 



* „ gibba. 

 Mya arenaria. 



„ truncata. 

 Pholas crispata. 

 Rhynchonella psittacea. 



authority of Mr Harmer. 

 authority of Mr S. Wood. 



