﻿BEITISH FOSSIL CEPHALOPODA. 



Plate VII. 



Fig. 



1. Orthoceras angulatum. — From the Upper Ludlow, Shropshire. In the 



Museum of Practical Geology. 



2. Orthoceras lineatum. — From the Bala Shales, Desertcreat. In the Museum 



of the Koyal College of Science, Dublin. 



3. Orthoceras angulatum. — From the Lower Ludlow, Ledbury. In the collec- 



tion of Dr. Grindrod. Showing the form of the siphuncle. a, the minor 

 ornaments magnified. 



4. Ibid. — From the Wenlock Limestone, Dudley. In the Woodwardian Museum. 



The largest met with. 



5. Orthoceras originale. — From the Wenlock Shale, Builth. In the Museum 



of Practical Geology, a, enlarged figure showing the biconvex shell. 



6. Orthoceras coralltforme. — From Bala Beds, Piedmont Glen, Ayrshire. In 



the Museum of Practical Geology. Part of an external cast. 



7. Orthoceras lineatum, var. tenuistriata. — From the Upper Llandovery, 



Marshbrook. In the Museum of Practical Geology. 



8. Orthoceras angulatum.— From the Wenlock Limestone, Donnington Wood. 



In the Museum of Practical Geology. 



9. Ibid. — From the same locality and collection as fig. 4, giving with that an 



idea of the size. 



10. Orthoceras originale. — From the Wenlock Shale, Builth. In the Wood- 



wardian Museum. 



11. Orthoceras lineatum. — From the Bala Shales, Desertcreat. In the Museum 



of Practical Geology. 



12. Orthoceras filosum, var. spectanda. — From the Wenlock Limestone, Led- 



bury. In the Museum of Practical Geology, a, the surface magnified. 



13. Orthoceras lineatum, var. tenuistrata. — From the Wenlock Shale, Builth. 



In the Museum of Practical Geology. 



