1 72 The Ottawa Naturalist. [November 



delivered the popular lecture on "An Entomological trip to 

 Algonquin Park" This was illustrated by lantern slides from 

 photographs taken during the trip. 



A. G. 



LIMN^A MEGASOMA. 



Limncea megasoma is undoubtedly the finest of the pond 



shells of North America. In the vicinity ot Ottawa it is found 



only in Meech's Lake, where it is least rare in a sheltered bay 



about two hundred yards north of the Tilley Cottage. The 



species occurs in many of the lakes of northern Ontario. It is 



abundant in both the outlets of Lake Temagami and is doubtless 



to be found in every bay of this beautiful lake. At the mouth of 



the French River and in the northwest arm of Lake Nipissing, it 



is quite common. But nowhere does it appear in greater numbers 



than in the centre of the new silver district Cobalt Lake. Here 



with unnumbered millions in value of precious mineral surround 



ing it, L. mcgasvna flourishes, despite the large quantity of 



arsenic present in the water, and many of the mature shells pre 



serve the rich brown tints which constitute the chief beauty of the 



young of the species. 



F. R. L. 



NOTE. 



The undersigned would ask all members of the Field 

 Naturalists' Club, who are so inclined, to send notes on birds 

 which have been observed where there is no doubt as to the facts 

 given as well as specimens for identification, and especially old 

 nssts of this year, together with data of the species that built it, 

 in what location it was, etc, in to him. Bv co-operation of this 

 kind much valuable information can be accumulated, which can 

 afterwards again be made use of for the benefit of the whole club. 



& 



C. W. G. ElFRIG, 



210 Wilbrod Street, 



Ottawa. 



