Reine FA OC i. 
The Graptolites of the Quebec group, which are the subject of the 
present Decade, were first discovered at Point Lévis in 1854, and were 
then confided for investigation and description to Professor JAMES Haut of 
Albany, the distinguished Palzeontologist of the Geological Survey of the 
State of New York. This was prior tu the appointment of Mr. E. 
BILiines as Palzeontologist to the Canadian Survey, in 1856. After a 
preliminary notice communicated by Professor Haut in 1855, extensive 
additions were made to the collection of Canadian Graptolites, which 
were placed in his hands; and in 1858 descriptions by him of nearly 
all the species here figured were published in the Report of Progress 
of the Geological Survey of Canada for 1857, but without illustrations. 
Figures of one of the species were however published in the Canadian 
Naturalist for June 1858; but various accidental difficulties having 
occurred in the preparation and engraving of the plates, the publication 
of the Decade has been delayed until the present time. | 
It is to be remarked that although the name of Decade, under which 
Parts I, I11,,and Iv were published, is still retained, this monograph is 
illustrated by not less than twenty-three plates. These are all from 
excellent drawings by Mr. R. P. Wurrrietp of Albany. ‘Twenty-one of 
them were engraved on steel by Mr. James Dutuim of New York, and 
the remaining two were lithographed by Mr. F. J. Swinton of Albany. 
W. EH. LOGAN. 
GEOLOGICAL Survey OFFICE, 
Montreal, December 1864. 
