Fig. 



13, 14. 



15-17. 



18. 



19. 



20. 



21, 22. 



23, 24. 



1. 



PROCESS-BLOCKS AND OTHER ILLUSTRATIVE FIGURES. 



Page 



Monograptus Flemingii, vars. y & 8 403 ; 



vomerinus, vars. a, j3, & y , 405- 



flexilis sp. nov. from Moel Ferna 407 



irfonensis, sp. nov., from the River Irfon 407 



testis var. inornatus nov 408 



Cyrtograptus Carruthersi and Monograptus Nilssoni 409 



Cyrtograptus rigid/as and Cyrtograptus Lundgreni 410' 



Geological sketch-map of the Ludlow district 424 



2. Sketch-map of the Elton-Lane section 426 



3. Section from Elton Hall to the Goggin across Elton Lane 427 



4. Geological sketch-map of the Builth district 430 



5. Sketch-map of the Builth district (southern area) 432 



6. „ ,, ,, (northern area) 435 



- f Section through Aberedw Hill from Tremaen to Penwaun 

 '■{ Pool 437 



8. Section from Upper Heldre to Heldre Hill (Long Mountain) . 442 



9. Monograptus dubius, proximal extremity showing the sicula ... 454 



10 f vulgaris, sp. nov., from Trefnant-Middletown Brook 



1 • ( (Long Mountain) 456 



11. tumescens, sp. nov 458 



12. corn's, sp. nov 460 



13. ultimus 462 



14. colonics (Barr.) 464 



15. varians, sp. nov 467 



16. var. pumilus nov 469 



17. Batmen (Barr.) 470' 



18. chimcera var. Salweyi (Hopk.) from Stormer Hall 473 



19. leintwardinensis, Hopk., from Church Hill Quarry 474 



20. uncinatus var. orhatus nov 476 



21. var. micropoma (Jaskel) 478 



— scanieus, Tullb., from Aberedw Hill 479 



oo 



— crinatus, sp. nov., from Lower Winnington Lane, Long 

 Mountain 481 



23 



24. ■ — Nilssoni (Barr.) 482 



25. bohemicus (Barr.) 484 



