788 LHE JOURNAL Of (GEOLOGY. 
the Smoky Hill River, south of Abilene, and not far below the 
Abilene conglomerate, the following species were collected: 
1. Pleurophorus subcuneatus, M. and H. (a) 
2. Bakevellia parva, M.and H. (c) 
3. Edmondia Calhount, M. and H. (?) (c) As identified by 
Geinitz (see Pl. II., Fig. 2 of Carb. und Dyas Nebraska). 
. Voldia subscitula, M. and H. (tr) 
5. Schizodus curtus, M. and W. (?) (rr) 
6. Nucula cf. Beyricht, v. Schauroth; also cf. WV. parva, 
McChesney. (a) 
. Aviculopecten (?) sp. (tr) 
. Septopora (?) sp. (tr) 
g. Small Gastropod cf. Achs Swalloviana, (Geinitz) Meek. (r) 
NN 
coo Ni 
very imperfectly preserved. 
Above this horizon the fossils are less frequent and in the 
upper part of the formation seem to completely disappear. 
Comparison of the Marion formation with Swallow's section.— 
The Marion formation commences with bed No. 39 of Swallow, 
but I have not been able to clearly identify the different beds 
of his section with the various strata of this formation as 
in the Chase, Neosho, and Cottonwood formations. Swallow 
described bed No. 23 as “‘bluish-drab shale, with calcareous con- 
cretions,” below which are limestones ‘full of Permian Acephala 
and Cephalopods,’* and gave this bed as from 49 feet 1 inch to 
103 feet g inches above the top of his first cherty limestone, 
which I have considered as the representative of the Marion con- 
cretionary limestone. The thickness of the rocks between the 
concretionary layer of bed No. 23 and the base of the formation 
indicate that it may be the upper concretionary layer which I 
have described northeast of Wonsevu. From 16 to 48 feet 
higher is the base of a ‘‘calcareous conglomerate’ 1 to 24 feet 
thick—bed No. 17—~and above this is a ‘‘concretionary lime- 
b) 
stone,” 2 to 15 feet in thickness, which are stated to occur in 
“Fancy and Turkey Creeks and Cottonwood.”* The maximum 
thickness of the rocks from the base of the calcareous conglom- 
tPrel. Rept. Geol. Sury. Kans., p. 12. . 
2{bid., p. II. 
