XX PEOCESS-BLOCKS AND OTHER ILLUSTEATIVE FIGURES. 



Fro. Page 



3. Geological map of the Roman- Fell area 536 



4—6. Vaughania cleistoporoides, ger\. et si:>. nov 565 



7. Spiriferina laminosa, showing tJie delthyrixim of the pedicle- 

 valve 572 



8-10. Sections of Stenophragma lohatum, gen, et sp. nov 574-75 



11 & 12. Sections of Stenopora compacta, sp. nov 578-79 



1. Map of the Permian rocks of Hamstead 644 



2. Section of the New Quarry, Hamstead 645 



3. Section from Hamstead Colliery eastwards to the Trias 647 



4-8. Comparative vertical sections of the Permian strata in the 



Hamstead district 652 



9. Twig of Walchia p)ijiiformis 656 



10. Cast of pith-cavity of Cort^azYes 657 



11 & 12. Ichnium sphm-odactyhan 661 



13 & 14. Ichniotherium cottcB g62 



15 & 16. Ichnium pachydactyhim 665 



17&18. Bo. do. {ungulatum) 666 



19. S>aurichnites hisnerianus 666 



20 & 21. Ichnium hrachydactykim 667 



22 & 23. Ichnium dolichodactylum 668 



24 & 25. Ichnium gampsodactylu7n 671 



26&27. Do. do. {minus) 672 



28. Ichnium cf. acrodactylum 674 



29. Tracks of Crustacea from Hamstead [Permian] 675 



30. Insect-wing (?), etc., from Hamstead [Permian] 677 



Dates of Issue of the Quarterly Journal for 1912. 



No. 269— February 29tb, 1912. 

 No. 270— July 8th, 1912. 

 No. 271— September i2tb, 1912. 

 No. 272— January 13th, 1913. 



