248 The American Geologist- April, isoo 
dix to Dr. Ells' Report.) By Henry M. Ami, M. A., F. G. S., Assis- 
tant Pakeontologist to the Geological Survey of Canada. 
In a highly disturbed and faulted region such as that portion of the 
Province of Quebec with which the above report deals, pakeontological 
evidence must necessarily play a very important part when the meas- 
ures prove so highly fossiliferous as they are known to be, not only in 
determining the various horizons met with in the intercalated, faulted 
and isolated patches of formations occurring on evejy hand, but also 
in enabling us to recognize the sequence of strata in their proper 
chronological order. 
Accordingly it will be seen that Dr. Ells' remarks on the geology of 
that district, which is the classic ground on which the famous 'Quebec 
group' controversy has been fought and decided, are copiously filled 
with lists of fossil species prepared by Mr. Ami of the Canadian Sur- 
vey staff. 
These lists were prepared by Mr. Ami from carefully made collec- 
tions at different localities with a view to ascertain the exact relative 
position of the various members of that "group." This object has 
been fully accomplished as is shown by the lists ; and except in the 
case of the collections from Notre Dame du Portage, St. Michael and 
certain districts in and around Quebec City, whence more perfect and 
more extensive material is necessary before a true and exact knowl- 
edge of the horizons can be obtained, there remains no uncertainty as 
to the true position of the strata in the other localities, of which there 
are thirty-six included in the Appendix. 
The list comprises one hundred and ninety species of fossils referable 
to ninety-one genera and these are exclusive of forms obtained in the 
limestone conglomerate bands in various localities, which do not afford 
good evidence as to the age of the beds from which they were obtained. 
The genera and species noted in Mr. Ami's list are as follows : 
Genera. Species. 
Brachiopoda 20 49 
Lamellibranchia . . 7 9 
Gasteropoda, 4 5 
Pteropoda 2 2 
Cephalapoda 3 3 
Cirripedia 1(?) ....!(?) 
Ostracoda 3 5 
Genera. Species. 
Spongiaj 2 2 
Caelenterata 2 3 
Graptolitoidea 22 75 
Cystoidea 1 1 
Crinoidea 2 2 
Vermes 1 1 
Bryozoa 7 8 
Trilobita : 15 Genera; 24 Species. 
The result of the above report and the evidence which the fossil re- 
mains have afforded naturally lead to the extinction of the term 'Que- 
bec Group,' as the various series of formations observed in the district 
examined have been separated into a true natural succession. The 
application of the terms 'Levis' and 'Sillery,' as Prof. Walcott states* 
in an exhaustive review of Dr. Ells' Report, to the "local development 
of the Calciferous terrane about Quebec" and the "passage beds and 
Cambrian strata of the St. Lawrence valley in the vicinity of Quebec 
is an admirable one," which certainly commends itself to all practical 
*Amer. Journ. Sc. Vol. xxxix, Feb. 1890, p. 114. 
