Loxonema sp.
Pleurotomaria perhumerosa Meek.
36. Owing to lack of detailed study of the rocks from the last described to the Cottonwood limestone, it will be necessary to combine the less important strata into groups and mention only the more important. It is a matter of regret that the rocks of this part of the Kansas river section cannot be referred with certainty to the corresponding rocks of the Neosho river and Cottonwood river sections, which have been studied by various geologists. As near as I am able to judge, No. 13 of Bennett’s Buffalo Mound section[[11]] corresponds to the Americus limestone near Emporia.[[12]] All the rocks between No. 35 and No. 13 of Bennett’s Buffalo Mound section are put under No. 36. They consist of an alternation of thin limestones and shales. These shales form a part, at least, of the “Olpe” shales of Dr. Geo. I. Adams (by permission, from his MSS.)
37. No. 13 of Bennett’s Buffalo Mound section. Probably is the equivalent of the Americus limestone before mentioned.
38. Elmdale Formation. Prosser and Beede, MSS. Shales with occasional thin limestones, quite fossiliferous in the lower portion. This is probably the same horizon as No. 2 and No. 3, except the limestone at the top, of Prosser’s Manhattan section.[[13]] It is also, in all probability, the same horizon as No. 8 of my section on the South Fork of the Black Vermillion river.[[14]] However, the fossils from the latter place are given in a separate list. The thickness of these shales on the Kansas river and Mill creek are from 111 to 118 feet. Grouping the Mill creek and the Manhattan equivalents, we have the fossils of this horizon as follows:
Fusulina secalica (Say).
Lophophyllum profundum (Milne-Edwards and Haime) Foerste.
Chætetes? sp.
Crinoid stems and plates.
Archæocidaris sp.