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The Winter Lectures. — 'i'he Soiree Committee will be pleased 

 to receive from members, as soon as convenient, the titles of any papers 

 which they may wish to re id before the Club during the coming winter, 

 and at the same time an intimation as to the time which will be most 

 convenient. 



Castorologia — The Editor begs to call the attention of readers 

 of the OiTAWA Naturalist to thi advertisement of the above work 

 on the last page of the cover. This work is by Mr. Horace T. Martin, 

 of the Montre.il Natural History Society, who gave us the pleasure of 

 his company at our Spring Excursion to Butternut Grove in 1889, and 

 spoke so acceptably to the members of the Club. Mr. Martin has 

 made a most careful study of his subject, and has had peculiar facilities 

 for getting information. He is a pleasing writer, and we feel sure that 

 all who obtain his work will be satisfied. 



The Geological Society of America. — Prof. H. L. Fairchild, 

 of Rochester, N. Y., Secretary of the Geological Society of America, 

 has sent the following notice to the Fellows of that society with reference 

 to the next meeting :— " In response to a cordial invitation from the 

 Royal Society of Canada and the Canadian Geological Society to this 

 Society to hold its next meeting in Ottawa, the Council has determined 

 that the fifth winter meeting shall be held in the City of Ottawa, begin- 

 ning December 28th, 1892." 



As a large number of the members of our Club take a deep interest 

 in geological matters, professionally and otherwise, it is anticipated that 

 the geologists from all parts of the North American Continent who will 

 be present on that occasion will meet with a hearty reception at the 

 hands of our members. Ottawa possesses sufficient attractions and 

 interest in geology to make this nieeting one of the most successful 

 ever held. 



Papers bearing on the geology and history of various parts of this 

 Continent will be read, the discussions of which will doubtless be both 

 profitable and interesting. 



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