we) 
Se) 
Homotrypella rustica Ulrich. 
Rhombotrypa crassimuralis (Ulrich). 
Dinorthis subquadrata (Hall). 
Hebertella occidentalis (Hall). 
*Platystrophia acutilirata (Conrad). 
*Platystrophia acutilirata senex Cumings. 
*Rafinesquina alternata (Hmmons). 
Rhynchotrema denatatum (Hall). 
Strophomena vetusta James. 
Strophomena planumbona (Hall). 
Strophomena sulcata (Verneuil). 
Zygospira modesta (Hall). 
In comparing the fauna of this cut with the numbers, one and two, of 
the Richmond type section, we find that many species that appear in the 
type locality are not found at Spades, but those that do appear at Spades 
are undoubted Whitewater species. Those that are limited to and charac- 
teristic of, the Whitewater, are: Homotrypa wortheni (James?) Platy- 
strophi aacutilirata senex, Cumings. Byssonychia obesa Ulrich, and 
Lophospira trophidopora (Meek). 
Twenty-four species were identified from Spades, three of which are 
new abd undescribed. The description and discussion of their morphy 
logical structure will be given in a subsequent paper. 
