Notices and Extracts from the Minutes of the Geological Society. 421 



4. — Notice accompanying some Specimens from the Blue Chalk Marl of 

 Bletchingley . By Gideon Mantell, Esq. m.g.s. [Read Jan. 17, 1823.] 



Observing in the excellent work on the geology of England, by Messrs. 

 Conybeare and Phillips, that a question has arisen respecting the nature of the 

 blue marlin the vicinity of Nutfield, Godstone, and Bletchingley in Surrey*; 

 and the writer of the passage to which I refer (Mr. Wm, Phillips) also re- 

 marking that " although the marl strongly reminded him of the blue marl at 

 Folkstone, yet he had not observed any organic remains," I take the liberty 

 of transmitting to the Society a few fossils which I collected several years 

 since from the foot of the hill near Bletchingley : they are as follows, 



1. Inoceramus concentricus. 6. Turbinolia Konigi. 



3. sulcatus. 7. Ammonites splendens. 



3. Nucula pectinata. 8. Belemnites Listeri, 



4. Rostellaria carinata. 9. Dentalium. 



5. Hamites intermedins. 



From these specimens, it may be inferred that the deposit in question is 

 identical with the Polkstone marl of Sussex, since nothing can be more deci- 

 dedly characteristic of the latter than the organic remains above enumerated. 



I would also beg to repeat, what I have elsewhere remarked {vide Illustra- 

 tions of the Geology of Sussex, p. 83,) that the blue marl of Bletchingley con- 

 tains layers of indurated reddish brown marl, similar to those which occur in 

 the blue chalk marl of Norlinaton near Lewes. 



5. — Notice of the Discovery of a large Fossil Elephant's Tusk, near Charmouth, 

 Dorset. By H. T. De la Beche, Esq. f.r.s. &c. [Read May 2, 1823.] 



I Professor Buckland has already noticed the discovery of fossil elephants' 

 tusks in the Charmouth diluvium f, which is composed of flint and chert mixed 

 with clay, the result of the destruction of the chalk, green sand, and a portion 

 of the lias marl, at the time of the formation of the valley. A small cliff of this 

 diluvium, resting upon lias marl, on the western side of the mouth of the Char, 

 is exposed to the action of high tides; it in consequence occasionally falls away, 

 and its fossil contents may then be observed. The fossil tusks of elephants 

 are the only remains of that animal which have as yet been found. In No- 



* Vide Outlines of the Geology of England, p. 152. 



t Geological Transactions, Second Series, Vol. I. p. 102. 



