PLATE III. 



Fig. Page. 



1. Macrocephalites typicus, nom. nov. — Scarborough. In the Sedgwick 



Museum, Leckenby Collection. 1 a, side view ; 1 b, front view. 42 



2. Macrocephalites typicus, nom. nov. ; young example. — Bedford. In the 



British Museum (no. C. 5073 a). 2 a, side view ; 2 b, front view. 42 



3. Macrocephalites typicus, nom. nov. ; small specimen. — Scarborough. In 



the Museum of Practical Geology (no. 8652). 42 



4. Macrocephalites macrocephalus (Schloth.) ; young form. — Scarborough. 



In the Museum of Practical Geology (no. 8653). 43 



5. Macrocephalites macrocephalus (Schloth.) ; medium-sized specimen. — 



Scarborough. In the Author's Collection. 43 



6. Macrocephalites macrocephalus (Schloth.) ; full grown, front view. — 



Scarborough. In the British Museum (no. 39566). 43 



7. Macrocephalites herveyi (Sow.). — Peterborough. In the Museum of 



Practical Geology (no. 8650). 46 



