TABLE nd various Collections. 



Oxyn. memismale 

 = Amal. Wiltshirei 



Raricostatus Zone. ! 

 = " bed. 1 



Cal. aplanatum 

 = Ariet. tardecresci 



I 



Oxyn. Guibalii 

 I 



Oxynotus Zone. 

 = " bed. 



i Schl. lacunata 

 i =Mgoc. '.' W 



. obtusum 

 riet. " 



Egoc. sagittarium 

 Slatteri 

 (pars) W. 



Oxyn. Lymense 

 = Amal. " W. 



I 

 Oxyn. Simpsoni 

 = Amal. " W. 



I 

 Oxyn. oxynotum 

 = Amal. " W. 



I 



Oxyn. Greenoughi 

 = Amal. " Vi 



I 



Amal. Guibalianum 

 W. 



Obtusus Zone. J 



= " bed. 



Agas. lasvigatum — 

 = Amm. " Sow. 



I 



Turneri Zone. 



= Tuberculatus bed. j 



-Agas. Scipionianum 

 = Ariet. " W. 



Upper 



Bucklandi Zone. -{ Schl. Boucaultiana 



= " bed. " W. 



Lower 

 Bucklandi Zone, 

 bed. 



Schl Oharmassei 

 = 7Egoe. " W. 



Angulatus Zone. 



lied. 

 Lower part of this zone 

 = Caloceras bed. 



Schl. angulata 

 = Mgac. " W. 



Schl. colubrata 



= ^Egoc. morianum W. 



I 

 Schl. catenata 



— iEgoc. 



W. 



Planorbis Zone. 



= " bed. 



Cal. Johnston 

 = ^goc. " W 

 = Belcheri (pars 



Psil. planorbe vai 



= Amm. 



erugatus 



1 May also occur in Oxynotus Zone, according to Wright. 



2 See Wright's Plates, pi. 6, figs. 2 and 3. 



3 The lines connecting the species of Arnioceras indicate 

 genetic bonds only in a very general wajv The true succes- 

 sion of the forms is not given in this part of this table. 



