upper Ordovician at Vci'ay^ lud. — Cinnings. 371 
18. Cyclora minuta Hall. 
19. Crania scabiosa Hall. 
20. Coiicliiolites sp. 
Zone F : 
1. Callopora rainosa (d'Orbigny) (c). 
2. Callopora rttgosa (E. & H.) (c). 
3. Bythopora dclicatula (Nicholson). 
4. Pctigopora pctccliialis (Nicholson). 
5. Ccranioporella ohiocnsis (Nicholson). 
6. Monticidipora inolcsta (Nicholson). 
7. Pcronopora decipicns (Rominger). 
8. Hcbcrtella occidentalis-sinuata Hall (aa). 
9. Platystrophia biforata-laticosta (Meek) (aa). 
10. Platystrophia biforaia-lyn.v (Eichw.). 
11. Rafincsqidna altcrnata-fracta (Meek). 
12. Zygospira inodesta Hall. 
13. Plcctortliis plicatclla Hall. 
14. Meganibonia sp. 
15. Calyvicne calliccpliala Green. 
Zone G : 
1. Callopora 'rugosa (E. & H.). 
2. Bythopora cf. delicatida (Nicholson). 
3. Platystrophia biforata-lynx (Eichw.). (aa). 
4. Hcbcrtella occidentalis-sinuata Hall (aa). 
5. Rafinesqiiina alternata-pondcrosa* (aa). 
6. Plectorthis sp. probably plicatella. 
7. Zygospira modesta Hall. 
8. Crania scabiosa Hall. 
1. PIctcrotrypa prolifica Ulrich (c). 
2. Nicholsonella vaupcli (Ulrich) (aa). 
3. Ceramoporella ohiocnsis (Nicholson). 
4. Pcronopora decipicns (Rominger) (c). 
5. Monticidipora molcsta (Nicholson) (a). 
6. Bytliopora gracilis (Nicholson) (c). 
7. Homotrypa curvata Ulrich. ? 
8. Hcterotrypa frondosa (d'Orbigny). 
9. Callopora rugosa (E. & H.) 
10. Callopora rainosa (d'Orbigny). 
11. Hcterotrypa inftecta Ulrich. ? 
12. Petigopora petechialis (Nicholson). 
13. Bythopora dclicatula (Nicholson) (a). 
14. Petigopora asperula Ulrich. 
15. Petigopora sp., form with diaphragms ad large acanlho- 
pores. 
16. Spatiopora maculosa Ulrich. 
*This name "used by collectors" ha«s no technical standing, but misht very 
well be adopted for the massive thick shclk-d nilinesqiiinas occurring so abund- 
antly in the '"lynx" beds. 
