PLATE V. 



Page. 



Figs. 1-4. Betulites Snowii, sp. nov 64 



5. Betulites Westii var. reuiformis 62 



6, 7. Betulites Westii var. rhomboidalis > 62 



6. Betulites Westii var. cuneatus 62 



9. Betulites Westii var. quadratifolius 62 



10-13. Betulites Westii var. inaequilateralis 62 



14. Betulites Westii var. lanceolatus 62 



15-17. Betulites Westii var. crassus 63 



18. Stipules of Betulites 65 



268 



