PLATE XXXIII. 

 Orthoceeas Ekwanense (page 265). 



J? igure 1. Side view of the type and only known specimen of this species, from the 

 Ekwan River. At the smaller end a piece has been cut out, but the 

 longitudinal section thus obtained shews only the cut edges of some of 

 the septa, but no traces of the siphuncle. 

 1. 1 a. Outline of the larger end of the same specimen, shev/ing the nearly ellip- 

 tical shape of the cross section, and the central position of the appar- 

 ently small siphuncle. 



Spyroceras Beaupoetense (page 323). 



Figure 2. Side view of a specimen of this species, from th,e Trenton limestone at 

 BeaujKjrt, P.Q. 

 II 2 a. Portion of surface of the same specimen ; three times the natural size. 



Orthoceras Walpolense (page 324). 



Figure 3. Side view of the type and only known specimen of this species, from the 

 Corniferous limestone at Walpole, Ont. 



Oethoceeas Hagersvillense (page 32-5). 



Figure 4. Side view of the type and only known specimen of this species, from the 

 Corniferous limestone at Hagersville, Ont. 

 II 4 a. Portion of the outer surface of the same ; four times the natural size. 



