7 
NEW SPECIES OF INVERTEBRATE FOSSILS FROM 
THE NON-MARINE FORMATIONS OF 
SOUTHERN ALBERTA 
By W. S. DyeTf Department of Mines, Toronto 
Page 
72-75 
Illustrations 
Plates III and IV. Illustrations of fossils 
The invertebrate fossils of the non-marine formations of southern 
Alberta will be listed and commented upon by the writer in a forthcoming 
memoir by Williams and the present writer, on the geology of southern 
Alberta and southwestern Saskatchewan. The non-marine formations 
include the Belly River, Edmonton, and St. Mary River of Upper Creta- 
ceous age; the Paskapoo, Willow Creek, and Porcupine Hills of Eocene 
age; and the Ravenscrag, probably also of Eocene age. In this paper, 
which should be regarded as complementary to the memoir, the new species 
and varieties are described and figured. The writer is indebted to Frank 
H. McLearn of the Geological Survey, Canada, for advice and assistance 
during the progress of the work, and to Dr. T. W. Stanton of the United 
States Geological Survey for allowing free access to the extensive fossil 
collections in the United States National Museum in Washington. 
PELECYPODA 
Unio suhprimaevis sp. nov. 
Plate III, figure 2 
This form is similar to U. primaevis White in possessing peculiar, 
posterior, radiating ridges; it also has anterior, radiating ridges of the 
same order. These ridges are not mentioned in White’s description of 
the type of U, primaevis, but are present on forms referred to it in the 
United States National Museum in Washington. U. suhprimaevis also 
has the umbonal ridge characteristic of U. primaevis and the furrow in 
front of it. The new species differs from White’s form in being considerably 
smaller, and in having the umbonal ridge less prominent and the furrow 
correspondingly more shallow. 
Dimensions of Type. Length, 26 mm.; height, 14 mm. 
Horizon and Locality of Type, Foremost beds, South Saskatchewan 
river one mile below the mouth of Bow river. 
Unio rncJearni sp. nov. 
Plate III, figure 15 
Several specimens of a highly ornamental Unio were collected from 
the Foremost beds on South Saskatchewan river. They are similar to 
Unio holmesianus White, redescribed and figured by Stanton^ but differ 
>Stanton, T. W.: U.S. Geol. Surv., Prof. Paper 98. 
