376 Dr. Fitton on the Strata [Nov, 



small quantity, may tend to supply a geological desideratum 

 of some importance, by furnishing distinctive characters for 

 the weald clay, which hitherto it has not been easy to recognize 

 in doubtful situations. 



Cypris faba. (Brongniart and Desmarest. Crustaces, p. 141. 



pi. xi. fig. 8.) — Hi/the. — Bethersden. — Pelworth. — /. of Wight. 



— Stvanage Bay (see hereafter, p. 382). 

 Cardium turgidum? (edge toothed). Min. Conch, pi. 343. — 



/. of Wight. 



■ a larger species (edge plicated). — Swanage Bay. 



Cyrena media (a new species). — I. of Wight. — Swanage Bay. 



a larger species. — I. of Wight. — Swanage Bay. 



• membranacea ? — Swanage Bay. 



Melania attenuata. — Swanage Bay. 



tricarinata. — /. of Wight. — Swanage Bay. 



Paludina elongata. — /. of Wight. — Swanage Bay. 



fluviorum. Mm. Conch, pi. 31. — Bethersden — Petivorth. 



— Sandoivn Bay. 

 Pinna? — Sicanage Bay. 

 Venus ? — Stvanage Bay. 

 A short univalve, like a Helix. — 1. of Wight. 

 A transversely elongated, almost cylindrical bivalve. — Stvanage 



Bay. 

 Tooth of a Crocodile. — Swanage Bay. 



The following are mentioned in Mr. Sedgwick's paper already 

 referred to:— 

 Ostrea ; an undescribed species, somewhat resembling O. tenera. 



Min. Conch, pi. 252. fig. 2 & o.—I. of Wight. 

 a small flat species? — /. of Wight. 



The only other place in which the Cypris is stated to have been 

 found in a fossile state, is in the Department of the Allier, in 

 the south-east of France ; where it occurs in the greatest profu- 

 sion, and is mentioned by Brongniart * as composing almost 

 exclusively the mass of a coarse fresh water limestone — (cal- 

 caire lacustre). In another part of the same district, land and 

 freshwater shells were observed, and veins of fibrous arragonite, 

 but without the cypris: and Mr. Brongniart considers the whole 

 tract as of freshwater origin. The occurrence of a fossil hitherto 

 so rare as the cypris, in such profusion, in counties so distant 

 from each other, is remarkable ; and renders it very desirable to 

 determine the geological relations of the strata where it has 

 been found in France. 



Hastings Sands. — The terms ' ferruginous ' and ' iron sands,' 

 denote a character that really belongs to the upper portion of 

 the green-sand ; and the former has been applied by Mr. Web- 

 ster "to a series which includes three strata at present known to 



. „.- K>JQ»n^anr>rj|a ml ■' - ■ --■ 



* Description Geologique des Environs de Paris.— Cuvier ossemens fossiles, &c 

 tome ii. Edit. 2 d % p. 536. 



