147 
but which has not, as far as I am aware, been recorded from the 
Ottawa district as yet. 
From the foregoing remarks it is hoped that such general characters 
of the rock formations of Rockland can be gathered as will be of 
service to those interested in the quarry as well as others. The beds 
of the Lower Trenton and those of the Black River formation 
almost everywhere in Eastern Canada have been used as building 
material, whether for piers, bridges or canals, and proved highly 
satisfactory. 
The Trent Valley Canal locks, as above stated, the piers for the 
Victoria Tubular bridge, the locks and improvements on the Lievre 
River, and the k>cks on the Rideau Canal at Ottawa, have all been 
constructed with stone from the Trenton and Black River formations. 
In the case of the Rideau Canal at Ottawa, the limestones con- 
stituting the upper half of the Trenton formation here are too nodular 
and concretionary for c*nal purposes, and if only blocks from the lower 
half had been used it would have saved the department thousands of 
dollars that were subsequently spent in repairs. 
In conclusion, the writer begs to thank Mr. Archibald Stewart for 
this opportunity of examining the geological features at the quarry under 
such favorable auspices, also for the information as to tests and reports 
of results made by the gentleman above quoted. 
BOOK NOTICES. 
The Butterflies of North America. Third series, Tart xiv, by W. H. Edwards. 
The last part of Mr. Edward's magnificent work has been received. 
It is a most interesting number and will be read with interest by all 
Canadian Lepidopterists. The three plates are particularly fine. No. i 
shows Nemninois Ridingsii in all jts styles. This is a Coloradan 
species flying at high elevations. No 2 illustrates Chionobas sEno and 
its variation var. Assimilis in which the band on the underside of the 
secondaries is wanting or scarcely showing. Both the type and the 
variety fly together in Labrador and on the highest summits of the 
mountains of Colorado. 
Plate 3 is of special interest to the members of our Club as it 
shows the fine species, Ch. Macounii, discovered by our indefatigable 
