De Ranee — On the Albian, or Gault of Folkestone. 169 



mus, and a Choanite ; the latter three species were obtained by Mr. 

 Topley.^ AH the species enumerated from zone i., occur in that por- 

 tion of it, under the horizon of Am. Goodhallii. A fragment of a 

 Pecten from the upper portion, appears to be a Lower Turonian 

 species. 



CENOMANIAN. 



This formation is 28 feet thick at Copt Point, the first 22 feet 

 being green sand and the remaining six brown sand. It runs from 

 this point to the air shaft of the tunnel, and from thence along the 

 underoliff capping the cliff section west of the Coastguard Station, 

 and occurs all along the beach a little east of the same, between the 

 cliff and the little patch of Albian beds i. and ii., locally called 

 ''Pelter Gault." 



The following fossils were collected by Mr. Topley and myself 

 from the Cenomanian of Folkestone : — Brachiolites {?), Solarium 

 ornatum, hioceramus Crispn{?), Ventriculites impressa, Exogyra conica, 

 JEJx. columha, Pecten orhicularis, and Lima parallela. 



Zone of Scaphites aqualis. — The " Chalk with green grains" or 

 ''Chloritic Marl," is seen at Folkestone, in the inlier at Copt, 

 where it occupies a small circle around the Martello Tower. It 

 is apparently unfossiliferous, and is five feet in thickness. 



The Lower Turonian sets in near Martello Tower 2, and is well 

 exposed on the beach at Abbots' Cliff. The Upper Turonian forms the 

 escarpment overlooking the Aptian plateau ; and the Danian first 

 appears at the top of the cliff a little west of the Preventive Station 

 at Abbots' Cliff. 



In conclusion, I would wish to thank Mr. Etheridge for his kind- 

 ness in determining the species of the majority of the fossils, and for 

 his assistance in various ways. 



List of the most Characteristic Species peculiar to each Zone. 



Zone XI. — (7 Species pecuHar.) Am. Beshayesii, Am. dentatus, Am. Gervillianus, 

 Trochosmilia sulcata. 



Zone IX. — (5 sp, p.) Mytilus Galliensis, Fusus Iterianus, Scalaria Dupiniana. 



Zone VIII. — (9 sp. p.) Pinna tetragona, Turbo decussatus, AmpuUaria Icevigata^ 

 Etyus Martini^ Falceocorystes Broderipii, Hoploparia longimana, Otodus appendiculatus. 



Zone VII. — (7 sp. p.) Hamites tuberculatus, Ham. Sablieri, Gervillia solenoides, 

 Rostellaria varicosa, Bellerophina minuta. 



Zone VI. — (6 sp. p.) Trochocyathus conulus, T. Harvey anus. 



Zone V. — (17 sp. p.) Ham. simplex^ Fecten quinquecostatus, ActcBon offinis, Avel- 

 lana injlata, Eostellaria Robinaldina, R. carinella, F. cingulata, Acmcea tenuicosta, 

 Turbo allied to Yonninus. 



Zone IV. — (13 sp. p.) Am. verstcosiatus, Rost. allied to pyrenaica, Fleurotomaria 

 Gibbsii^ Cyathina BoiverbanJcii, Fdaphodon brevirostris (?), Fycnodus. 



Zone III. — (2 sp. p.) Falceocorystes Stokesii. 



Zone II. — (15 sp. p.) Hamites elegans, H. armattts, Kingcsna lima, Adelia Beehei. 

 Species Characteristic of Lower Albian. — Belemnites attenuatus, Rostellaria 

 carinatd, R. Farkinsoni, Turritella granulata, Fhasianella Gaultina, Fterocera 

 retusa, Cyclocyathus Fittoni. 



1 Who also obtained Trochocyathus conulus{}) from it.— C. E. R. 



vol. v. — NO. XLVI. 12 



