PLATE LXXXVIII. 



Fig. 1. Aptychus. From the Inferior Oolite of Leckhatnpton Hill, of unusual size. 



Probably belonging to Cosmoceras Parhinsoni. My collection. 



2. An aptychus,. Belonging to Arietites stettaris. Lower Lias of Charmouth. 



My collection. 



3. — Perhaps belonging to Arietites Conybeari. Locality unknown. 



British Museum. 



4. — Locality unknown. British Museum. 



