PLATE LI. 



Zone of Aegoceras Jameson?.. 



Pig. 1. Aegoceras Jameson i, Sowerdy. Side view, natural size, large ribbed variety. 



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



and belongs to the Bristol Museum. 



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



collection . 



4. — — — Do. do. Pabba. do. 



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



6. — — Siphonal area, same shell. 



