PLATE LI. 



Zone of Aegoceras Jamesoni. 



Fig. L Akgoceras Jamesoni, Sowerhy. Side view, natural size, large ribbed variety. 

 .2. — — — Siphonal area, do. Collected at Mungar, 



and belongs to the Bristol Museura. 



3. — — — Side view, natural size. Hechingen. My 



collection. 



4. — — — Do. do. Pabba. do. 



5. — — — Young shell, do. Leckhampton. do. 



6. — — — Siphonal area, same shell. 



