2l6 



THE NON-MARINE MOLLUSCA OF THE 

 WALTON CRAG. 



By A. S. KENNARD and B. B. WOODWARD, F.L.S , F.G.S.. &c 



IT is indeed a matter of congratulation that the small patch of 

 Red Crag at Walton has been preserved for the geologist's 

 pick, and has not shared the fate of the adjoining patch at 

 Harwich which is now a thing of the past. At the same time 

 it must be pointed out that the Walton Crag is of much larger 

 extent than is commonly supposed ; and Mr. F. W. Harmer has 

 recently obtained a fine series of shells from Little Oakley. 

 Unfortunately our present knowledge of the Pliocene Molluscan 

 Fauna is by no means perfect. The nomenclature is in an 

 almost hopeless condition : collections have been dispersed, 

 several " types" cannot now be traced, and it is greatly to be 

 desired that some competent person will endeavour to place on 

 a more satisfactory basis our knowledge of the fauna of the 

 Crags. As a slight contribution to this end we have ventured 

 to revise the Non-Marine Mollusca, and this was published last 

 year." 



Thinking, however, that an account of the Non-Marine 

 fauna of the Walton Crag would be of interest to all Essex 

 naturalists, we offer the present note. 



Six species in all ha\e been recorded from the Walton 



Crag :— 



I. Pyramidula rysa. (S. V. Wood.) 



Helix ilpd, S. V. Wood; Crag Moll., vol. i., p. 4, pi. i., fig. i ; Helix 

 rufeseens, Penn., \ar. ? ; J. G. Jeffreys, Quart. Jour. Geol. Soe., vol. 

 xxvii. (1871), p. 493 ; Patula {Jannlus) rysa, S. V. Wood; C L. F. 

 Sandberger, Land (s- Snsstv Conch. Vorxvclt., p. 737. 



Only one example of this species has been found at Walton, 

 and this was obtained by Mr. G. S. Gibson from inside the 

 mouth of an example of Buccininn undiduui, Linn. It is the type 

 of the species, and is now preserved in the Saffron Walden 

 Museum. Only one other example is known, and this was 

 obtained from the coprolite diggers at Waldringfield by Mr. 

 Canham, and is now in the Ipswich Museum. Its nearest allies 

 are apparently I'yrawidula calathus (Lowe) and P. hifyous (Lowe) 

 from Madeira, and it may be referred with these to Lowe's 

 section Jannlus. 



I " A Revision III tlu: Pliocene Non-Marine MolluscT of England " By A. S. Kennard 

 and B. B. Woodw.u d, I'M, S. l'r«c. Malac. Soc, vol. iii., pp. 187-204. 



