584 TRANS. OF THE ACAD. OF SCIENCE. 
I now proceed to describe the divisions of the System in 
the order laid down in the above section. 
I.—Upper Cretaceous or Catcarrous Division. 
extension reaches a much greater development. It presents 
i rds: Caprina 
Limestone, Comanche Peak Group, Austin Limestone, Exo- 
gyre arietina Marls, Washita Limestone, Inoceramus pro- 
blematicus Beds, and Caprotina Limestone. 
The fossils are chiefly Caprina, Cytherea, and Ammonites, 
member of the series, and presents a greater —. 
both horizontally and vertically, than either of the others. 
is made up of soft, yellowish and whitish chalky ee 
a 
County, will convey a pretty good idea of the general nee 
logical features of the mass: 
No. aE Caprina Limestone...-.. eee eee ee eeee oe eee eearee eoseee dae 
‘* 2. Buf calcareo-magnesian limestone -+++++ seeere serene Yee 
: 8. Soft, chalky limestone, abounding in Exogyra Texana: hey 
‘ 4. Light, gray, hard, silicious limestone +++-++ +++ ****" ie 
5. Light yellow, earthy limestone, of sandy texture-+*****" —s 
a The same, but of a lighter color ++++++ «sess +++** > ee 1 
i same, more compact in teEXtUre «eeree sovese vere? 
oer 
eee 
a sn 
“8 
