26G 



•exactly like the tbicker shells. The rats in such places liave apparent- 

 ly not learned to distinguish the two genera. 



Beyond Masham mills, where the mill dam was undergoing repairs, 

 the muddy river bed was almost dry. The same shells were found 

 here as lower down, and in addition Canipeloma decisuni ruficm, 

 Planorhis trlvolvis, P. hicarlaatus, Say, Uaio coinplanatiis, and Spkae- 

 rium sulcatum. Higher up, the river became rapid and narrow, with 

 a pebbly bottom — a mere mountain brook— -and no shells were found 

 in it. 



Later in September the outlet from Leamy's Lake was explored. 

 Where it joins the Ottawa a single fine specimen o^ Anodonta benedicii, 

 Lea, was collected. In the same vicinity, and especially at the mouth, 

 of Brigham's Creek, the surface of the water near the shore was one 

 warm evening observed almost covered by innumerable univalves float- 

 ing foot upward. Physa heterostropha was the species most abundant. 

 Scai'cely less common were Planorhis hicarinatus and P. albus, Miill., 

 while P. trivolcis — a medium sized, robust, dark brown form — and 

 Limnma catascopium were sparingly i-ej) resented. 



As the polyzoa are classed under the mollusca, it may not be out- 

 side the metier of this branch to mention the occurrence of numerous 

 large colonies of Pectinatella inagnijica in the bay into which the outlet 

 from Leamy's Lake flows. 



With a view to preparing a complete list of the terrestrial mol- 

 lusks of this vicinity a special effort was made by visiting new localities 

 to collect h11. the species which occur here. The results, in part suc- 

 cessful, have been sec forth in a paper recently road before the club. 



F. R. LATCHFORD. 

 4th March, 1885. PASCAL S. POIRTER. 



