Plate XXIX Continued. 



Fig. 7. NEMATOPOBA LINEATA Billings 646 



7. A branch. Natural size. 



7 a. Portion of same x 18. 



7 b. Vertical section, x 18. 



7 c and 7 d. Two transverse sections, x 18, the first abnormal. 



7 e. Portion of Id. x 50, to show the minute axial tubes and wall structure. 



Anticosti Island. 

 Fig. 8. NEMATOPOBA ALTEBNATA Ulr 646 



8 and 8a. Branch, natural size, and a portion, x 18. 



Top of Trenton, Alexander Co., 111. Illinois State Museum. 



Fig. 9. NEMATOPOBA BETBOBSA Ulr 645 



9 and 9 a. Fragment. Natural size, and a portion, x 18. 

 9 It. Nertical section, x 18. 



Top ol Trenton, Alexander Co., 111. Illinois State Museum. 



Fig. 10. NEMATOPOBA FBAorns Ulr tilt; 



10. A fragment, showing mode of branching. Natural size. 

 10 o. Portion of same, x 18. 



10 ft. Vertical section, x 18. 10 c. Transverse section, x 50. 



Top of Trenton, Alexander Co., 111. Illinois State Museum. 



Fig. 11. NEMATOPOBA DELICATULA Ulr 646 



11. A complete example. Natural size. 



11 a. The basal portion x 18. 



11 li. Transverse section, x 50. 



Alexander Co., 111. Illinois State Museum. 



Fig. 12. NEMATOPOBA QUADBATA Ulr 644 



12. A branch. Natural size. 



12 o. Portion of same, x 18. 

 12 6. Vertical section, x 18. 



12 c. Transverse section, x 50. 



Trenton limestone, Trenton Falls, N. I. E. O. Uhich. 





