CONTENTS 
PAGF 
Faunal and sediment variation in the Anticosti sequence 1 
By W. H. Twenhofel. 
New species of Devonian Crinoidea from northern Canada 15 
By Frank Springer. 
The range of certain lower Ordovician faunas of the Ottawa valley, 
with descriptions of some new species 19 
By Alice E. Wilson. 
The fossil molluscan faunas of the marl deposits of Ottawa district. . 59 
By E. J. Whittaker. 
Two new North American Cycadeoids 79 
By G. R. Wieland. 
Illustrations 
Plate I. To illustrate article by Frank Springer 87 
II-IV. To illustrate article by Alice E. Wilson 89-93 
V-VIII. To illustrate article by E. J. Whittaker 95-101 
IX-XII. To illustrate article by G. R. Wieland 103-109 
Figure 1. Sketch map showing geographical relations of sections 
studied 20 
2. Part of the western face of the Stewart quarry at Rockland 
showing the conformity between the Leray beds and the 
lowest Trenton 23 
3. The western end of the Stewart quarry, Rockland, show- 
ing the upper part of the Lowville, all of the Leray beds, 
and the lowest section of the Trenton 25 
4. Comparative section of the Black River and Trenton 
strata 29 
5. Corallite 46 
6. Comparison of umbilicus slope and upper surface of : 
A, Eotomaria rotunda n. sp.; B, E. supracingulata ; C, 
E. dry ope 55 
7. Leperditia trentonensis n. sp 57 
8. Cycadeoidea Sternbergii sp. nov 83 
19856—1 
