﻿BRITISH FOSSIL CEPHALOPODA. 



Plate XXX. 

 Fig. 



1. Nautilus quadrans. — From the Lower Ludlow, Ledbury. In the collection 



of Dr. Grindrod. 



2. Trochoceras rapax. — From the Lower Ludlow, Ledbury. In the collection 



of Dr. Grindrod. a, outline of the radial section. 



3. Trochoceras striatum. — From the Wenlock Shale, G-arcoed, Usk. In the 



Museum of Practical Geology. 



4. Ibid. — From the same locality and collection, a, magnified view of the 



surface near the convex side, showing ornaments, b, ditto near the concave 

 side, showing epidermids. 



5. Trochoceras undosum. — From the Lower Llandovery, Llandovery. In the 



Museum of Practical Geology, a, outline of the sutures. Sowerby's type. 



6. Ibid. — From the same locality. In the Museum of Practical Geology. A 



young example. 



7. Cyrtoceras (?) equisetum. — From the Lower Ludlow, Ledbury. In the col- 



lection of Dr. Grindrod. 



