PLATE XXXIII. 



PAGE. 



Fig. 1. Orthoceras (Cyceoceras), Nova-Careiseense, Foerste 545 



View of interior cast. B. O. 



Orthoceras (actinoceras) ceavatum Hall 538 



View of the interior cast, B. O 



Orthoceras (actinoceras) youngi Foerste 537 



A vertical section showing the siphon on one side. H. I. 



Orthoceras (actinoceras) eata-nummueatum Foerste 538 



A vertical section through the siphon. S. H. O. 



Orthoceras (cyceoceras) amycus Hall 546 



A badly preserved exterior. B. O. 



Orthoceras (actinoceras) daytonense Foerste 539 



A vertical section passing through the siphon. S. H. O. 



Orthoceras (actinoceras) turgido-nummueatum Foerste 538 



A vertical section passing through the siphon. S. H. O. 



Gomphoceras orToni Foerste 533 



a. Aside view of the living chamber, b. A transverse section of the same near the 

 last septum. ' B. O. 



Fig. 



2. 



Fig. 



3. 



Fig. 



4. 





4. 



Fig. 



5. 





0. 



Fig. 



6. 





6. 



Fig. 



7. 



Fig. 



8. 





8. 



