Raymond — Succession of Faunas at Levis, P. Q. 525 



6. Hard, dark green clay shale. No fossils seen. 9 ft.= 241 ft. 



7. Banded green and gray shale with very 

 numerous graptolites and brachiopods. The 

 mostfossiliferous layer is seventeen feet above 

 the top of No. 5. Lowest bed with Pidymo- 



graptus bifidus 19 f t.= 260 ft. 



8. Dark gray shale band. _ 6ft.= 266ft. 



9. Similar shale, weathering yellow. Contains 

 graptolites, Pidymograptus bifidus (90° va- 

 riety) and Phyllograptus anna being most 

 characteristic 3 ft. = 269 ft. 



10. Dark gray shale . ._ 9ft.= 278ft. 



11. Similar shale weathering yellow. Graptolites 



present. Top of range of D. bifidus 4 ft. = 282 ft. 



12. Alternating bands of shale which weathers 



gray or yellow. No fossils seen 51 ft.= 333 ft. 



13. Limestone conglomerate. 4 inches 



14. Dark shale above, and yellow weathering 



shale with Tetragraptus serra below 1 2 ft. = 345 ft. 



15. Limestone conglomerate with 4 inches quartz 



sand at top._ 4ft.= 349 ft. 



16. Dark gray shale 30 ft.= 3*79 ft. 



17. Thin bedded blue limestone, without fossils.. 3 ft.= 382 ft. 



18. Dark gray shale. _. 12 ft.= 394 ft. 



19. Thin-bedded limestone with a bed of con- 

 glomerate at top and bottom. Zone of Shu- 



mardia granulosa and Piplograptus dentatus 14 ft. = 408 ft. 



20. Dark shale, weathering yellow 14 ft.= 422 ft. 



Top of bluff. 



In the lower layers of the above section below the street, no 

 fossils have so far been found. Above the street, the lower 

 strata (No. 4) are very thin-bedded, break into small pieces, 

 and though graptolites are present, as is shown by fragments, 

 it has not so far been possible to collect them. The really fos- 

 siliferous part of the section begins therefore about 215 feet 

 above the base. Throughout the next 57 feet fossils are fairly 

 abundant, extremely so in zone 7. This entire thickness is 

 characterized particularly by species of Pidymograptus, the 

 lower 24 feet by the " horizontal " types (P. nitidus, etc.), 

 and the upper 33 feet by a " dependent " species {P. bifidus) 

 as well as many of the larger " horizontal " species. Brachio- 

 pods are exceedingly abundant, and the originals of Elkania 

 desiderata, (Billings), Acrothele levisensis Walcott, and 

 Lingulella irene (Billings) undoubtedly came from this zone. 



Above this zone the strata appear to be almost barren till 

 the limestone at the top of the bluff is reached. In the inter- 

 mediate strata only a single fossil has been found, a specimen 

 of Tetragraptus serra. The limestone at the top of the bluff is 

 exceedingly fossiliferous, in certain layers, and about forty 

 species have been identified, one-half of them graptolites, the 



