PROF. E. FORBES ON LOWER GREEN SAND FOSSILS. 353 



Cephalopoda. 



143. Belemnites lanceolatus Sow. M. C. t. 600. f. 8, 9.? 



Loc. Boughton, Atherfield, Maidstone. The specimens are very- 

 imperfect. 



144. Nautilus radiatus Sow. M. C. t. 356. 



Var. /3. Nautilus neocomiensis D'Orbigny, T. C. pi. 11. 

 Loc. Sandgate, Atherfield, Peasemarsh, Hythe. 



Note. The form /3 scarcely deserves the distinction of a constant variety. 

 The two forms occur together and pass into each other. Specimens occur 

 occasionally closely resembling, if not identical with Nautilus pseudo-elegans 

 D'Orbigny, T. C. pi. 8. and 9. Roemer considers Nautilus radiatus itself a 

 variety of Nautilus elegans. They appear to me to be truly distinct and repre- 

 sentatives of each other in time. 



The Nautilus from the Lower Greensand of Sandgate, recorded as Nautilus 

 simplex, appears to have been a bad specimen of the Nautilus radiatus. 



The young of the Nautilus radiatus is the Nautilus incequalis of the Mineral 

 Conchology. PL 40. lower figures. 



145. Nautilus undulatus Sow. M. C. t. 40. upper figure. 



Loc. Red Hill, near Reigate (where this fine species is frequent). 



146. Nautilus plicatus Sow. in Fitton, G. T. 2d ser. vol. iv. 



(woodcut.) p. 129. 



Syn. Nautilus Requienianus D'Orbigny, T. C. pi. 10. 

 Loc. Court-at- Street. 



147. Ammonites Nutfieldiensis Sow. M. C. t. 305. 



Var. /3. Simsii. Inner volutions more exposed, outer whorl 

 narrower, ribs strong and acute. 



Loc. Maidstone. j3. at Hythe (perhaps a distinct species). 



148. Ammonites furcatus Sow. in Fitton, G. T. 2d ser. vol. iv. 



pi. 14. f. 17. 



Loc. Hythe, Atherfield. 



149. Ammonites Deshayesii Leymerie, Mem. Geol. Soc. Fr. vol. v. 



t. 17. f. 17. 



Loc. Atherfield, Hythe. Identified with French specimens, 

 (pi. v. fig. 2.) 



150. Ammonites mammillaris Schlotteim (D'Orbigny, Morris's 



Cat.) 



Syn. Ammonites monile Sow. M. C. t. 117. 



Loc. The specimen in the collection is marked " Lower Green- 

 sand," but no locality is given. 



VOL. I. A A 



