88 THE NAUTILUS. 



mark on Salt Spring Island towards the end of August, only a 

 few miles from Maple Bay, "as the crow flies." If it had not 

 been the dry season I dare say I might have discovered more 

 or had better success. 



Pisidium sp. 



Two or three small shells, one living, were found in a very 

 shallow pond, fed by the surrounding enow banks, on Mt. 

 Arrowsmith, Vancouver Island, at an elevation of over 5,000 

 foet, on August 6th, 1914. 



Contents of Wild Duck's Crop and a few other notes. In Octo- 

 ber my son shot some ducks (Canvas-backs) on Quamichan 

 Lake, which lies a quarter of a mile below, or distant from, our 

 house, and when cleaning them he came and told me that their 

 " crops " appeared to be full of shells. I got him to empty one 

 of them on to a newspaper, and later sorted them out, with the 

 following result: 



Lymnsea sp. Several dozen, mostly juvenile, but some half 

 an inch long. 



Physa sp. About the same number and size. 



Planorbis exacutus Say. Three specimens. 



Valvata virens Tryon. Over 200 specimens. The species is 

 greenish and perfectly smooth, and I give this name, as it is the 

 name mentioned by the late Rev. G. W. Taylor in his catalogue 

 of the mollusca of this province, and no other species is listed. 



Sphxrium or Pisidium sp. Two, one fairly large but both 

 may be Pmdia in about the same quantity as the Valvata. 



An examination of the crops disclosed absolutely no sign of 

 food of any other kind, and all the crops there were six birds 

 appeared to be crammed with shells. 



I have found the bivalves fairly abundant in this lake about 

 the roots of the \vater lilies, but the Valvata only rarely, not 

 more than 20 having been taken, so this catch was quite a 

 "find." 



Quamichan Lake, B. C. (Vancouver Island). 



