Plate LXII Continued: 



PAGE. 



Tig. 7. THAMNISCUS OCTONAEIUS Ulr 611 



7. A perfect frond of the natural size. 



7 a. Obverse side, x9, showing the arrangement and form of the zooecia 

 apertures. 



7 b. Portion of same, x35, to show more clearly the form of the apertures, 



and other features. 



Upper Coal Measures, Greenwood Co., Kansas. 



Illinois State Museum. 



Fi -. 8. THAMNISCUS SCULPTILIS Ulr 008 



8. Reverse side of a fragment, xfl. 



8 a. Obverse side of a smaller specimen, x9. 



8 li. Portion of same, x!8. 



Keokuk group, King's Mountain, Ky. 

 E. O. Ulrica's collection. 



Fig. 9. THAMNISCUS FUBCILLATUS Ulr 609 



9. A specimen of the natural size. 



Chester, Illinois. 

 Illinois State Museum. 



9 a. Fragment of the natural size, xlg, showing the usual appearance of the 



obverse face. 



Kaskaskia. 111. 



E. O. Ulrich's collection. 



Fig. 10. THAMNISCUS DUBIUS (Schlotheim) 606 



Id, 10 a. Two specimens of the natural size, both showing dissepiments. 

 Permian. Poesneck, Germany. 

 Keokuk group, King's Mountain, Ky. 

 E. O. Ulrich's collect:on. 



Fig. 11. DIPLOPOEA r. i s i , KI \ i , i :- Ulr Ii37 



11. Two specimens, natural size, showing mode of branching. 

 11 a. Poriferous side, slightly obliaue. x!8. 



11 b. Reverse aspect, xl8, showing near the upper end the prominence of 

 the peristomes. 



11 c. Side view of an imperfest specimen, x!8. 



Lower Coal Measures, Seville, 111. 

 Illinois State Museum. 



Fig. 12. DIPLOPOEA BIFUKCATA Ulr 637 



12. Three specimens, natural size. 



12 a. One of them, x9. 



Chester group, Chester, 111. 

 Illinois State Museum. 



