1878.] 341 [Eathbun 



Brunswick, under Prof. L. W. Bailey. He did not, however, confine 

 himself to New Brunswick, but gave much time to the study of the 

 geology of Nova Scotia. His name figures prominently in the re- 

 port of Prof. Bailey, published in 1865, and also in Dr. Dawson's 

 "Acadian Geology," (2d ed., 1868). Many of his results were pub- 

 lished in the reports of others, and it is thus difficult to tell how 

 much we should accredit to Hartt; but some of his results have been 

 given us separately, so that we are able to make the following general 

 summary of his principal discoveries in the Provinces. 



In 1861 he discovered that the Devonian shales at Duck Cove, 

 Lancaster, near St. John, were richly fossiliferous, and contained, in 

 addition to the many remains of land plants, fossil insects, the oldest 

 of any known to science. Mr. Geo. F. Matthew, of St. John, had 

 previously found a few obscure plant fragments in these same beds, 

 and also in the shales at the foot of the city of St. John. These 

 were described by Dr. Dawson, who also worked up most of the 

 species afterwards obtained by Hartt. Mr. Hartt's observations on 

 these beds were continued through the years 1861, '62, and '63, and 

 he has given us, as a result of his labors, a minute description of the 

 several beds and their fossil contents. Of insects there were dis- 

 covered five species, represented by fragments of wings only. Mr. 

 S. H. Scudder, who studied them, has referred them all to the 

 Neuroptera, in part to new, in part doubtfully to old, families, and 

 suggests that some of the forms represent synthetic types. 



Mr. Hartt, in connection with Prof. Bailey and Mr. Matthew, 

 made in 1864, the first large collection of fossils obtained from the 

 Acadian or Primordial group in the vicinity of St. John. The prin- 

 cipal localities examined were Ratcliffe's ravine and Coldbrook, at 

 which latter place Mr. Matthew had previously discovered a few ob- 

 scure forms. From these, however, no satisfactory conclusions as to 

 the exact age of the beds had been attained. The new collections, 

 consisting mainly of finely preserved trilobites, were placed in Hartt's 

 hands for study, and by him worked up with great care at Cam- 

 bridge, Mass. He published, in 1865, his preliminary report upon 

 them, in which he proved that the beds in which they were found 

 are equivalent to about the " etage C " of Barrande, or the Potsdam 

 group proper of America. This report -contained the first positive 

 evidence of the existence of Primordial strata in New Brunswick. 

 Descriptions of the principal fossils by Hartt, with many figures, are 

 contained in Dr. Dawson's "Acadian Geology " (1868). 



