Charles Frederick liar It. 11*7 



had not been determined, but which were supposed to be 

 a downward continuation of the measures which contained 

 the Devonian plants. At first only some badly preserved 

 trilobites were found, which, on account of their long thor- 

 aces were supposed to be of Lower Silurian age. 1 



Subsequently (1863) much better material of well pre- 

 served species of trilobites were found by the author in 

 Portland (St. John) and these, with the collections of the 

 Geological Survey of Southern New Brunswick, were placed 

 in Mr. Hartt's hands for study. Taking advantage of the 

 opportunities which he possessed at Cambridge, he gave 

 these fossils a careful scrutiny, and was able to announce 

 that they were equivalent in age to those of Etage" C. of M. 

 Barrande and, therefore Primordial. After his first brief 

 notice in the report of the Geological Survey of New 

 Brunswick, announcing this discovery, Hartt continued 

 his study of these organisms with the aid of additional 

 material. Upon this material, together with what had 

 been previously obtained, was based his fuller descriptions 

 of the fossils, with many figures, which appeared in Dr. 

 (now Sir Wm.) Dawson's Acadian Geology in 1868. 



In 1864 Mr. Hartt and the author were invited by Profes- 

 sor L. W. Bailey, to take part with him in the Geological 

 Survey of Southern New Brunswick instituted by the Pro- 

 vincial Government. The results of this survey were pub- 

 lished in the following year, and were a very important ad- 

 dition to the knowledge of the geological structure of this 

 part of New Brunswick. The results embodied in this re- 

 port, formed the basis from which the Geological Survey of 

 Canada in this region, after the confederation of the Cana- 

 dian provinces, was carried on. 



Beside his work on this survey in New Brunswick, Mr. 

 Hartt did independent geological work in Nova Scotia. In 

 1864 he obtained proof of the pre-carboniferous age of the 

 gold of Nova Scotia. His observations were made at Cor- 



1 At that time the Cambrian had not by common consent, been 

 separated from the Lower Silurian. 



