92 BULLETIN OF THE NATURAL HISTORY SOCIEXY. 



these two harbors, and so the main hnes of depression of this 

 peninsula area. Not that this condition of depression is entirely 

 due to the softer texture of the later rocks, but there is little 

 doubt that the lines of weakness and faulting that have been 

 determined where these strips of the more recent sediments are 

 let in, have continued to be lines of weakness and faulting in 

 later ages. 



The history of geological events in this district may be sum- 

 marized as follows : 



1. The oldest recognizable deposits are the quartzites and 

 limestones of the " upper series" of the Laurentian area, which 

 appear in the hills south of the basin. 



2. A great break in the succession of beds then follows. This 

 includes the time when the Coldbrook (Hvironian ?) and St. John 

 groups were deposited, and so extends from pre-Cambrian to 

 early Ordoviciaii time both included. It also includes the later 

 Ordovician, which appears to have been a time of continental 

 elevation in New England and Acadia. 



3. Second period of sedimentation. At this time the Little 

 River group was deposited. 



4. Folding of this group with heavy erosion, exposing the 

 limestones and quartzites of the Laurentian. 



5. Another period of sedimentation during which the Mispec 

 group was deposited. 



6. Third period of erosion, with folding and faulting of the 

 beds, exposing again the Laurentian rocks. Great lateral pressure 

 and partial metamorphism of all the older terrains accompanied 

 these changes. 



7. Another period of sedimentation, during which the Lowe^ 

 Carboniferous terrain was laid down. 



8. This terrain also was uplifted and folded, but the subse- 

 quent geological changes are not exemplified by any deposits in 

 this district until the Glacial epoch. 



The organic remains collected from the sandstones, etc., at 

 Lepreau will form the subject of a future communication. 



— G. F. M. 

 Zoology. 



The zoological results were mostly negative. Owing to the 

 shortness of time the camp was in session, unfavorable weather 

 and difficulty of obtaining a proper boat, no dredging was done, 

 and exploration was confined to walks along the shore at low 

 tide. The fauna is the usual beach fauna characteristic of this 

 region, and nothing was observed to difFei'entiate it from the 

 well-known assemblage of animals about Frye's Island. It was 

 hoped that in Lepreau basin, sheltered as it is, traces would be 

 found of the southern forms which linger in small colonies in 



