PLATE XL 



PAGE 



Fig. 10. Ammonites Traskii. 63 



Natural size. 



Fig. 12. A. ramosus. 65 



Slightly diminished in size. 



12 (7. Section of a volution. 



Fig. 13. A. Hoffmannii. 65 



% Natural size. 



13 a. Section of volution. 



