Where to find "Amoebae" in Winter. 305 



In some places on the south and west contact and between 

 the typical anorthosite and the gneiss there occurs a 

 dark basic gneiss similar in appearance to the supposed 

 contact product of the Morin area. 



In this great Saguenay area, therefore, the supposed 

 " Upper Laurentian " consists of an enormous mass of 

 gabbro, norite and troctolite with plagioclase preponderat- 

 ing, presenting the same structural varieties as those 

 found in the Morin area. Like the latter it probably 

 owes its unconformity to its igneous origin, and finally, as 

 in the Morin area, the anorthosite is overlaid by hori- 

 zontal unaltered beds of Cambrian age, so we find also 

 in many places upon the anorthosite of the Saguenay area 

 small areas of horizontal unaltered Cambro-Silurian lime- 

 stone and shales of Trenton and Utica age. The fact that 

 these are in no wise altered by the anorthosite proves 

 clearly that the latter is much older. 



Where to find " Amoebae " in Winter. 



By W. E. Deeks, B.A., M.D. 



Nothing will try the patience of a person more than to 

 be compelled to search over a great many slides, and then 

 often in vain, in the attempt to find a single Amoeba for 

 demonstration purposes. 



Circumstances such as these induced the writer to try 

 and find the conditions under which they flourished, and 

 might without difficulty be found. 



During the summer season they can be readily obtained 

 by scraping the 'under surface of a floating weed or in the 

 superficial ooze along the bottom of any fresh water pond. 

 During the winter this climate necessitates aquaria, and 

 of these a certain amount of care is necessary to keep 

 them in a living condition, whence they can be quickly 



