PLATE II. 



Fig. 



1. Scapliaspis truncatus, an internal cast. Kington, Herefordshire. In the Museum 



of Practical Geology. 

 I a. Side view of the same specimen. 



2. Sc. truncatus, internal cast. M. P. G. 



3. ,, „ a beautifully preserved specimen, showing the sculpturing of the 



surface. M. P. G. 



4. Sc. Ludensis, from the Lower Ludlow beds of Church Hill. In the Museum of 



Practical Geology. 

 4(3;. Sc. Ludensis (concave surface) ; from the Upper Ludlow beds, near Ludlow. Mr. 

 Lightbody. 



5. Sc. rectus, a fragment, showing the surface markings. Shropshire. Mr. Wyatt- 



Edgell. 



6. A concave cast (figured upside down) of Sc. rectus ; from the Cornstones, Worces- 



tershire. In the author's cabinet. Observe the posterior notch. 



7. A very fine convex cast of Sc. rectus; from Worcestershire. In the British 



Museum. 



8. Sc. rectus ; from a sketch made for Professor Huxley. 



9. Cyathaspis Banksii, concave cast, showing the surface-striations ; from the 



Downton Sandstones, Kington, Herefordshire. M. P. G. b, Lateral cornua; 

 c, rostrum; d, central disc. 



10. I Convex casts of C. Banksii; from Kington, Herefordshire. In Mr. Banks' 



11. J collection, a, Orbital? tubercles. 



12. 1 Convex casts of Sc. rectus; from Hall's Barn, Worcestershire. In the author's 



13. J cabinet. 



