n.39. 



Dorsal, lobe. 



SD Dorsal Saddle. 



Superior ' teral lobe. 



SL Z ^. </-,</ Saddle. 



W Inferior lateral lobe. 



SV ',',', I .. i 



Ventral lobe. 



it' . ft :..'■•'.' ntrr lobe. 



. . ft ...,-,'• /.>!*,■ 



^/it.itliiin- lobe - 



■ ltt.fta<»v lobe 

 Auxiliary lobe. 



Ammonites lu-U'i uphvlliis, in Litis at Whitby 



