Mr. Brown on the Clacton Fluvio-Marine Deposit. 427 



are informed that M. Drapiez has ascertained by numerous 

 experiments that the fruit of the Feuillea cordifolia is a 

 powerful antidote against vegetable poison. The genus Feu- 

 illea is common to South America, and the subject is of such 

 interest that it deserves a trial. 



EXPLANATION OF THE FIGURES. 



Plate XII. Branch of the Urari plant, Strychnos toxifera, Schonib., less 



than natural size. 

 Plate XIII. Fig. 1. Fruit of the Urari plant, natural size. 



Fig. 2. Do. cut transversely, natural size. 



Fig. 3. Seed of do., natural size. 



XLIII. — A List of the Fossil Shells Jound in a Fluvio-Marine 

 Deposit at Clacton in Essex. By Mr. J. Brown *. 



Gentlemen, 



The fossils named in the accompanying list were obtained 

 by searching the beds which compose the fluvio-marine de- 

 posit at Clacton, on the eastern coast of Essex, a section of 

 which is given in the ^ Mag. Nat. Hist.,^ vol. iv. p. 199, N. S., 

 with a description of the geological features of that forma- 

 tion. 



In a note appended to that article, which accompanies the 

 above-mentioned section, a promise is held out to the readers 

 of the Magazine, that a list of the fossils, which have excited 

 a peculiar and lively interest in the Clacton deposit, would at 

 some future opportunity be furnished. 



It is intended by the present communication to supply that 

 deficiency ; and as the greater number of the fossil shells, 

 both of marine and freshwater species, collected from those 

 beds, have been very recently submitted to the notice of Mr. 

 J. D. C. Sowerby, the list is offered with the greater confi- 

 dence. 



Fossils of the Bed No. 4. in Section fig. 9. Mag. Nat. Hist. vol. iv. 

 p. 194, N. S. 



Marine. 



1. Balanus ovularis } Lam. 



2. Tellina solidula. 



3. tenuis. 



4. Mactra ovalis. Sow. A crag fossil. 



5. Mytilus edulis. Mostly very young. 



6. Cardium edule. 



* Vide Mag. Nat. Hist. vol. iv. p. 197, N. S. 



