PROF. E. FORBES ON LOWER GREENSAND FOSSILS. 355 



digitated, and the superior lateral lobe fully developed and much 

 divided. 



Loc. Atherfield. 



154. Ammonites multiplicatus Roemer, Cret. Geb. t. 13. f. 3.? 

 Loc. Hythe. 



A large and handsome species allied to A, Astierianus, but 



more compressed. 



155. Ammonites inflatus Sow. M. C. t. 178. 

 Loc Atherfield. 



156. Ammonites ? 



Fragment of a species from Hythe, allied to A. consobrinus 

 D'Orbigny, T. C. pi. 47., but too imperfect for certain determina- 

 tion. 



157. Ammonites'? 



Fragment of a very distinct species from Peasemarsh, re- 

 sembling Ammonites Leopoldinus D'Orbigny, T. C. pi. 22. 



158. Scaphites grandis {Hamites sp.) Sow. M. C. t. 593. f. 1. 



Syn. Scaphites Hillsii Sow. in Fitton, G. T. 3d ser. t. 15. 

 f. 1, 2. 

 Ancyloceras grandis et Hillsii D'Orbigny. 



Var. (3. Crioceras Bowerbankii ( Tropceum sp.) Sow. Geol. Tr. 

 2d ser. vol. v. t. 34. f. 1. 



Loc. Atherfield. 



Note. I can find no certain characters by which to distinguish between the 

 several fossils brought together here under Scaphites grandis. The original figure 

 of the Mineral Conchology represents the anterior portion of the same shell, 

 entire specimens of which constitute the Scaphites Hillsii, whilst the Crioceras 

 Bowerbankii differs only in the anterior portion being in juxta-position with 

 instead of disjoined from the posterior whorls, a difference which can only be 

 regarded, in the absence of other characters, as a local variation. I have placed 

 the species in the old genus Scaphites, under which it appears to me most of 

 the cretaceous species of Scaphites, Crioceras, and Ancyloceras, may be naturally 

 grouped, admitting as a character distinguishing them from Ammonites, the 

 greater or less disunion of the whorls, and from Hamites, the spiral arrangement 

 of the posterior volutions. The genus Helicoceras of D'Orbigny seems to me 

 to be founded on the young states of his Ancyloceras, as are also many of the 

 species of Crioceras. 



159. Hamites. (Imperfect specimens.) 

 Loc. Hythe. 



{End of the Mollusca.) 



A A 2 



