GLAS STALGA DION OF VO PPERIPAEASOZOIG ROCKS. 70% 
preserved may be found. This is especially true of Chonetes gran- 
ulifera, Owen, which in places may be collected by the hundreds 
from the top of the underlying limestone, or in the soil formed 
by the decomposed shale. 
In the Cottonwood shales at the Rettiger Bros.’ quarry the 
following species were collected : 
Oo WN eS 
Sy py Ga IN 
16. 
17 
18. 
. Chonetes granulifera, Owen. (aa) * 
. Derbya crassa, (M. and H.) Hall and Clarke. (a) 
. Athyris (Seminula) subtihta, (Hall) Newb. = A. argentea, 
(Shep.) Keyes. (a) 
. Productus semireticulatus, (Martin) de Koninck. (a) 
. Meekella striato-costata, (Cox) White and St. John. (c) 
. Productus nebrascensis, Owen. (1) 
. Aviculopecten McCoyi, M. and H. (r) 
Imperfectly preserved specimens which seem to agree 
closely with this species. There are heavy coste which 
show the base of spines and these ribs are separated by 
two or three smaller plications. 
. Straparollus (Euomphalus) subrugosus, Meek and Worth.= 
catilloides, (Con.) Keyes. (rr) 
. Septopora biserialis, (Swallow) Waagen. (rr) 
. Rhombopora lepidodendroides, Meek. (tr) 
. Lophophyllum proliferum, McChesney. (tr) 
. Fusulina cylindrica, Fischer. (rr) 
. Aviculopecten occidentalis, (Shum.) M. and W. (rr) 
. Dielasma bovidens, (Morton) H. and C. (rr.) 
. Chetetes cf. carbonarius, Worth. (tr) 
In addition to the above list the following species were 
obtained from exposures of the Cottonwood shales near 
Cottonwood Falls or Strong City: 
Phillipsia scitula, M. and W. (?) (rr) 
Crinoid plates and stem. 
Fish plate. 
The relative abundance of the species is indicated in the following manner : 
a=abundant; aa=very abundant; c=common; r=rare; rr=very rare, when but 
one or two specimens are found. 
