768 LE JOORNAE ORAGBOL OGM. 
11. Spivorbis sp. (1) 
12. Cf. Acls robusta, Stevens. (1) 
In the light gray shaly limestones as exposed on the road up 
the Crusher Hill—No. 10 of the section—are the following 
Species : 
1. Productus nebracensis, Owen. (aa) 
2. Aviculopecten occidentalis, (Shum.) Meek and Worth. (a) 
3. Pseudomonotis Hawni, (Meek and Hayden). (a) 
4. FPleurophorus subcostatus, Meek and Worth. (c.) 
5. Myalina perattenuata, M. and H. (r) 
6. Myalina kansasensis, Shum. (11) 
7. Meckella striato-costata, (Cox) White and St. John. (rr) 
8. Derbya cf. crassa, (M. and H.) Hall and Clarke. (rr) 
9g. Cf. Achs Swalloviana, (Gein.) Meek. (c) 
10. Spivorbis sp. (c) 
11. Ldmondia sp. (tr) 
12. Sellerophon sp. (rr) 
13. Discina sp. (rr) 
14. Zaphrentis sp. (rr) . 
On the banks of the South Fork of the Cottonwood River at 
Matfield Green, and by the roadside three-fourths of a mile 
north of the village are good exposures of a very hard dark gray 
to bluish shaly limestone. The presence of an abundance of a few 
species of fossils in this limestone has been noted at various local- 
ities and thus forms a characteristic feature of the formation. 
This horizon belongs, probably, to No. 12 or 13 of the Crusher 
Hill section, and at Matfield Green is the following fauna: 
1. Pleurophorus subcostatus, Meek and Worth. (a) 
2. Productus nebrascensis, Owen. (a) 
3. Aviculopecten occidentalis, (Shum.) Meek and Worth. (a) 
4. Pseudomonotis Hawni, (M. and H.) (c) 
5. Pseudomonotis Hawni, (M. and H. var. ovata, M.and H. (c) 
6. Lellerophon cf. sublevis, Hall, or Uriz, Fleming. (a) 
7. Small Gastropod ct. Achs sp. (see fig. in Dana’s Manual of 
Geol, lout J8Gl,, jo, O85, f Zt), (e) 
8 Myalina (?) Swallovi, McChesney. (c) 
9 Ldmondia cf. nebrascensis, (Geinitz) Meek. (1) 
