PLATE VII. 



Fig. 



1. Epithyris sufRata, Sckloi/ieim. Dorsal aspect; cast, natural size. Humbleton Hill. 



2. — — Cast. Dorsal aspect, natural size : a, impressions of the 



dental plates. Humbleton Hill. 



3. — — Ventral aspect of specimen at fig. 2. 



4. — — Lateral aspect of specimen at fig. 1 . 



5. — — Frontal aspect of specimen at fig. 2. 



6. — — Dorsal aspect of a testiferous specimen, natural size. 



Tunstall Hill. 



7. — — Ventral aspect of a testiferous specimen, natural size : 



a, foramen. Tunstall Hill. 



8. — — Lateral aspect of specimen at fig. 6. 



9. --- — Frontal aspect of specimen at figs. 6, 8. 



10. Cameraphoria Schlotheimi, VonBuch. Dorsal aspect of a specimen entirely without 



ribs. Tunstall Hill. 



11. — — Dorsal aspect. Variety with one rib in the sinus; cast: 



a, cast of the arch. Humbleton Hill. 



12. — — Dorsal aspect of a testiferous specimen. Var. with two 



ribs in sinus. Tunstall Hill. 



13. — — Ventral aspect of last specimen : a, open fissure. 



14. — ■ — Dorsal aspect of a two sinus-ribbed specimen without 



lateral ribs. Tunstall Hill. 



15. — — Dorsal aspect of a young specimen of last variety. Tunstall 



Hill. 



16. — — Dorsal aspect. Var. with three ribs in sinus. Tunstall Hill. 



17. — — Dorsal aspect. Var. with four ribs in sinus. Tunstall Hill. 



18. — — Dorsal aspect of a young specimen of last variety. Tunstall 



Hill. 



19. — — Dorsal aspect. Var. with five ribs in sinus. Tunstall Hill. 



20. — ^ — Ventral aspect (natural size) of a specimen, with lateral 



marginal expansions {a), Tunstall Hill. 



21. — — Lateral aspect (natural size) of another specimen, with 



frontal marginal expansions [a). Tunstall Hill. 

 (All the figures are of the natural size. The Tunstall Hill specimens 

 are testiferous.) 



