107 
shale, on Athabaska river, where Inoceramus lundbreckensis , Baculites cf. 
ovatus Say, and Ostrea cf, congesta Conrad are found. It is possible that 
this fauna is the same as one, containing Baculites ovatus , which occurs in 
the upper part of the Colorado shale in parts of Alberta. Hume 1 has 
noted it in Turner valley, Rutherford 2 on Jumpingpond creek, and Warren 
and Rutherford 3 at various localities. Warren and Rutherford correlate 
their U B. ovatus ” fauna with the Telegraph Creek fauna of the United 
States interior . 4 
The Inoceramus cf. lundbreckensis fauna in the basal beds of the Allison 
formation is a depauperate marine one and includes Legumen napii n, sp., 
Ostrea saxitoniana n. sp., Pteria sp., Plena! sp., Inoceramus cf, lund- 
breckensis, and shark and other teeth. None of these species is known 
elsewhere. The resemblance of Inoceramus cf. lundbreckensis to I . lund- 
breckensis , however, suggests that it is very close in age to the I. lund- 
breckensis fauna and not far from that of the Eagle fauna. 
The preservation of the Corbula fauna is rather poor for determination 
of age. Its marine contents may be a last survival of the Eagle fauna. 
The Claggett or Pakowki fauna appears to be absent and here 5 as in north- 
western Montana 6 the Claggett or Pakowki sea does not appear to have 
extended as far west as the later Bearpaw sea, although there is no evidence 
that the Bearpaw extended farther west than the Disturbed Belt in south- 
west Alberta. The very earliest Montanan sea, of Inoceramus lundbrecken- 
sis time, may have extended farther west than the Bearpaw, in southwestern 
Alberta as well as in west-central Alberta, as noted by Rutherford . 7 
The age of the Allison flora is discussed in an accompanying paper . 8 
In the Unto danae fauna, which occurs in the upper and greater part 
of the Allison formation, Unio danae and Sphaerium planum suggest corre- 
lation with the Foremost and Pale Beds of southern Alberta and the Judith 
River formation of the United States interior; they do not define its 
upward range, however, for they are long-ranging species. The entire 
Allison formation, therefore, embraces equivalents of the Eagle, Claggett, 
and Judith River formations of the United States interior and Milk River, 
Pakowki, Foremost, and Pale Beds of the southern plains of Alberta. 
Whether it extends higher to include the equivalents of the Bearpaw and 
even higher to embrace the equivalent of the St. Mary River, etc,, is not 
known. 
1 Hume, G. S.: Geol. Surv., Canada, Sum. Rept. 1926, pt, B, pp. 6, 7 (1927). 
* Rutherford, R. L,: Alberta Sei. Indust. Res. Coun., Rept. No. 17, pp. 31-33 (1927). 
* Warren, P. S., and Rutherford, R. L.: Am. Jour. Sci., vol. 16, pp. 133, 136 (1928). 
4 Warren, P, S., and Rutherford, R. L.: Am. Jour, Sci., vol, 16, p. 135 (1928). 
* McLearn, F. H.: Geol. Surv., Canada, Sum. Rept. 1914, p. 63 (1915). 
8 Stebinger, Eugene: U.S. Geol. Surv., Prof. Pap. 90G, pp. 67, 68 (1615). 
» Rutherford, It, L.: Alberta Sci. Industr. Res. Council, Rept. No. 17, p. 37 (1927). 
* Berry, Edward W.: The Allison Flora, this volume. 
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