397 



A mere casual inspection of the above list will show the Pottsville 

 aspect of the plants. Of these forms Sphenophyllum cuneifolin.m, S. bi- 

 furcatum, S. tenerrimum?, Asteropbyllites erectifolius, A. gracilis, Ale- 

 thopteris Evansi, A. granclifolia, A. lonchitica, Neuropteris Elrodi, N. fim- 

 briata, N. Jenneyi, Pseudocopteris clecipiens, Shenopteris communis, Car- 

 diocarpon annulatum, C. cornutum, C. pachytesta?, have not been re- 

 ported. I believe, from formations younger than Pottsville age. Of those 

 Pottsville forms Sphenophyllum bifurcatum, Alethopteris Evansi, A. 

 lonchitica, Neuropteris Elrodi, N. fimbriata, and Cardiocarpon cornutum 

 were reported by White* as being confined to the Upper Lykens Coal 

 group of the Pottsville type section. Sphenophyllum cuneifolium and 

 Cardiocarpon annulatum were reported from both the Upper Lykens Coal 

 group and the Upper Intermediate group of the type section. Alethopteris 

 grandifolia was reported from the Lower Intermediate group in the type 

 section. The vertical range of several of the remaining forms is either 

 not definitely known or is too great for correlation purposes ; the rest of 

 the forms are too poorly preserved for specific classification. Therefore 

 only those forms reported from the Pottsville type sections are considered 

 of value for correlation. A comparison of the list of Pottsville plants 

 from the Yoho School locality with the list of plants from the Pottsville 

 type section indicates that the Pennsylvanian of the Yoho School area 

 represents an horizon in the upper part of the Middle Pottsville of the 

 type section. 



List of plants from the Cincinnati locality : 

 Calamites approximatus Schloth. 

 Calamites sp. 



Lepidodendron clypeatum Lx. 

 Lepidodendron sp. 

 Neuropteris lunata? D. W. 

 Lepidophloios sp. 



Of the above listed forms Calamites approximatus and Neuropteris 

 lunata? have been reported from the Upper Lykens Coal group of the type 

 section of the Pottsville. Lepidodendron clypeatum has too great a ver- 

 tical range to be of value as a horizon marker. The other forms were too 



*White, David. The Stratigraphic Succession of the Fossil Floras of the Pottsville Formation 

 in the Southern Anthracite Coal Field, Pennsylvania. 20th Ann. Rep't. U. S. G. S. Part II. 1900. 



