LAMPLUGH : IHE NEOCOMIAN CLAY AT KNAPTON. 337 



this latter supposition is the more probable, I have since found 

 evidence in another (juarter. 



Seeking to elucidate certain points in connection with the Speeton 

 fauna, I recently re-examined the chief public collections of the 

 Speeton Clay fossils ; among others, those of the Museums of South 

 Kensington, Jermyn Street, Cambridge, York, and Scarborough, 

 which contain a large proportion of the local collections made when the 

 Knapton pits were open. During this examination I took note of any 

 fossil observed to bear a ' Knapton ' label, with the following results : — 



At South Kensington are certain specimens of Ammonites 

 labelled Amm. hiaptone7isis Bean ; these seem to be identical with 

 the species occurring in the Upper beds (Zone of Bel. seinicanali- 

 cnlatus) at Speeton recognised as Amm. deshayesii Leym. 



In the same collection a small tray labelled ' Knapton ' con- 

 tains, besides an example of the species just mentioned, one 

 specimen of Amm. planus Phil, (probably Amm. tiisus D'Orb.), 

 which occurs at Speeton in the Middle^ and perhaps also in the 

 Upper, portion of the series, along with two small specimens of" 

 Amm. noricus Schloth., whose position at Speeton is in the lower 

 part of the zone oi Bel. jaculum.^ With regard to the last-mentioned 

 species, I have some doubt whether the Ammonites really came from 

 Knapton, as they so closely resemble Speeton specimens. 



At Cambridge (Leckenby Collection), and also at York, are speci- 

 mens of a small Brachiopod in a different state of preservation from 

 those usually found at Speeton. These are labelled Terebratulina 

 striata, but are more probably Terebratulina martiniana D'Orb., f 

 which occurs near the top of the zone of Bel. jaculum at Speeton 

 and probably also in higher beds. 



In the Scarborough Museum there is a tablet of crushed bivalves 

 stated to be from Knapton, which are probably Pholadomya 

 martini Forbes, a shell with a wide range at Speeton, extending 

 from the base of the zone of Bel. jaculum to the ' cement-bed ' of the 

 zone of Bel. semicanaliculatus. 



These are the only Knapton fossils I could find,^: but they are 

 sufficient to show that some, at any rate, of the pits were opened in 

 the upper members of the Speeton series, the occurrence of the 

 highly characteristic Amm. deshayesii under the MS. name of 



* See my paper in (^uait. Journ. Geol. Soc. , vol. \\\. p. 575, for description 

 of Speeton Zones. 



t I am indebted to Mr. J- F. Walker, M.A., for this determination. 



J I am informed that a good collection of Knapton fossils was for some time in 

 private hands, and was afterwards presented to some public museum. I have been 

 unable to trace this collection, and should be very grateful for any information, 

 Nov. i8qo. x" 



