484 F. B. Meek—Fossils of the Illinois Geological Report. 
Art. XLVI—Notes on some of the Fossils figured in the recently- 
issued Fifth volume of the Illinois State Geological Report ; by 
F. B. MEEK. 
[Continued from page 376.] 
this as merely with the view of keeping in mind forms with 
which it was thought desirable that they should be compared 
in revising the text forthe press, and not with any intention of 
ultimately using them as if the fossils were known really to 
belong to two distinct species. They are, on the contrary, 
almost certainly extreme varieties of the common F. cylindrica 
Fischer. The first does not agree exactly, in form, with the 
California specimens for which the name /. gracilis was origl 
nally proposed, though it does not differ very materially. wd 
other is smaller, and even more ventricose than the Kansas 
specimens named ventricosa, as a mere variety of F. cylindrica, 
and is better entitled to rank as a distinct variety than that 
figured on the same plate under the name F. gracilis. 
t 
