1912] The Ottawa Naturalist. 67 



lered. Mr. Halkett showed zoological specimens gathered 

 and spoke oi the convenience of a Latin name which is the 

 same in all countries. Mr. Calvert, for the ornithologists, told 

 of the lurds that had been observed. Dr. Malte determined 

 many plants which had been collected, and Mr. A. Gibson 

 showed mosquitoes in their larval stage, and spoke of the life- 

 history of these insects. 



There was no excursion on Saturday, May 18th. The 

 steamer on Lake Deschenes was not yet running, and the boat -trip 

 had to be cancelled, and as it was tag-day for the city hospitals 

 it was decided to omit the exctirsion altogether. 



There was no excursion on Saturday, May 25th, the day 

 alter Empire day. 



E.H.B. 



THE OCCURRENCE OF OSTREA IN THE 

 PLEISTOCENE DEPOSITS OF THE VICINITY OF 



MONTREAL. 



By Edward Ardley. Peter Redpath Museum, McGill 



University. 



Sir William Dawson in his list of Pleistocene Fossils pub- 

 lished in his volume entitled "The Canadian Ice Age," records 

 that he collected a loose specimen of Ostrea virginiana at Saco. 

 This he states was apparently derived from the Leda Clay, and 

 he also states that he had received from Mr. Paisley specimens 

 he same species which had been found at the Baie des Cha- 

 leurs. and which were also said to have come from the Pleisto- 

 cene Beds in that district at a depth of 16 feet below the surface. 

 The late Mr. E. T. Chambers, some years ago, presented to 

 the Peter Redpath Museum of McGill University, a specimen of 

 Ostrea which he had collected at Beauport, Quebec, and which 

 he believed had been derived from the Pleistocene of that locality. 



During the present summer the waiter has collected Pleisto- 

 cene Fossils from the Leda Clay and Saxicava Sand, exposed in 

 an excavation made for a drain in the Town of De Lorimier, 

 near Montreal, found at a depth of 9 feet below the surface 

 specimens of Ostrea associated with Mya truncata, Macoma 

 calcarea, Astarte. Laurentiana and Saxicava rugosa, this last 

 mentioned species being found in great numbers. This occur- 

 rence in the vicinity of Montreal proves definitely that this 

 genus occurs in the Pleistocene Molluscan Fauna in the extreme 

 western portion of the Province of Quebec. 



