Ammonites, 16 ^ 



Ammonites proper, 16 



Planites, 16 



Ceratites, 16 ' 



Orbulites, 16 



Scaphites, 16 



Baculites, 16 



Hamites, 16 



Turrilltes, 16 

 Camerines, 17 



Siderolithes, 17 : 



Helicostega, 18 ' 



Helicostcga nautiloidea, 18 ' 



Helicostega ammonoida, 18 i 



Helicostega turbinoida, 18 

 Stycostega, 18 I 



Enallostega, 19 | 



Agathistega, 19 ' 



Entomostega, 19 



CLASS II.— PTEROPODA. 



Clio, 20 



Cymbulia, 20 



Pneumodermon, 20 



Limacina, 20 i 



Hyalea, 20 I 



Cleodora, 21 j 



Cleodora proper, 22 



Creseis, 22 



Cuvieria, 22 



Psyche, 22 



Eurybia, 22 

 Pyrgo, 22 



CLASS III.— GASTEROPODA. 



Ori>eh I.— PULMONEA, 27 



Pulmonea Terreslria. ' 



Limax, 29 I 



Limax proper, 29 ' 



Arion, 31 . 



Lima, 32 ; 



Vaginulus, 32 



Testacolla, 33 i 



Parmacella, 33 I 



Helix, 33 ) 



Helix proper, 33 

 Vitrina, 34 

 Bulimus, 34 



Bulimiis proper, 34 



