DISTRIBUTION OF SPECIES IN OTHER NORTHERN COALFIELDS. 291 



Several in this category, however, do not seem to appear below the upper 

 half of this series so that their evidence, though of little weight, tends to 

 corroborate that of the rare Pecopterids in arguing for a stage at some 

 distance above the base of the Lower Productive Coal Measures or Alle- 

 ghany series. 



The synchronologic evidence of the flora will, however, be most suc- 

 cinctly and briefly compassed if we take into consideration the distribu- 

 tion of onty those species which, so far as known, have a restricted vertical 

 range. In the following table is given the distribution of the species of 

 limited vertical range as observed* by the writer in the collections from 

 the bituminous coalfields of Illinois, Indiana, Ohio, and Pennsylvania, 

 and from the Northern Anthracite field : 



Abridged Distribution in other Basins in the northern United States of the Plants from the 

 Henry County Lower Coals, having, so far as observed, a limited vertical Range in this 

 Country. 



Name of species, f 



Morris coal or Mazon 

 Creek, Illinois. 



Kittanning coals of In- 

 diana or Ohio. 



Darlington coal at Can- 

 nelton, Pennsylvania. 



Anthracite coals of the 

 northern field. 



OQ 



o 

 bo 



03 

 02 



be 



a 



ErcTnoptfiris missouriensis Lx 



+ 



+ 

 + 

 + 

 + 











Pxeudopecopteris obtusiloba, (Brongn.) Lx. 

 Pseudopecorjteris squamosa., (Lx.) 











+ 





DandE 



Kansas. 



Jfariopteris sphenopteroides, (Lx.) Zeill. . . 

 Sphenopteris pinnatifida, (Lx.) 









E(?) 

 E(?) 



Kansas. 



S. mixta, Schimp 



(?) 



+ 

 + 

 + 



Kansas. 



>S. Incoei, D. W 



-f (?) 



$. chxrophylloides, (Brongn. ) Presl 



$. cristata, (Brongn ) Presl. 



-t- 

 + 



(?) 



D and E 



*S'. brittsii, Lx . . 







Splienopteris, n. sp.f 



+ 









Sphenopteris. n. sp.f 





+ 

 4- 





S. siibcrenulata, (Lx.).. 



+ 



+ 

 + 









OJigocarpia cf. Gutbieri Goepp . 







Pecopteris, n. sp.f 



+ 



4- 







* The danger of basing conclusions upon the recorded distribution has been explained in the 

 preceding note. A large portion, perhaps the greater part, of the material on which the geo- 

 graphic record of the Mesocarboniferous species in the United States has been based has been 

 utilized in preparing the present tabulation. The occurrence of species at localities the strati- 

 graphic relations of which are unknown is omitted. This is the case with most of the Rhode 

 Island plants. Reference is made to the horizon only, except in certain instances of exception- 

 ally well elaborated local floras. 



t In order to avoid the publication of nomina nuda in a communication in the form of an ab- 

 stract the specific designations of the new species are omitted. 



The author is not responsible for the punctuation or capitalization of the plant names, but ac- 

 cepts under protest the system adopted in this publication. He prefers not to use the comma 

 and to retain the capital when the name of a species is derived from that of a person. — Editor. 



