6 University of Michigan 



toni. Amnicola occurs here, one of the few habitats for that 

 genus. 



The Turtle ]Mouxtains 



Upsilon Lake : In the eastern part of the mountains, not 

 far from St. John. The water was thick and green with algae, 

 and myriads of small Crustacea swarmed on and about the 

 bottom. Dead shells occurred in heaps, Vak-ata tricarinata 

 being especially numerous, but few species were found aliye 

 in the lake. A new Pisidium {P. apicnlatiiui Sterki, MS) 

 was taken from the bottom in gravel a few feet from shore 

 where the water was about two feet deep. The wooded 

 shores are of the same type as those of Devils Lake. 



Gravel Lake : Connected Avith Upsilon Lake and of some- 

 what the same character. The water was clear, however, and 

 more live shells inhabited it. Dead clam shells were taken 

 from the bottom, some in fairly good condition, but no live 

 clams were seen. \\'ater has been drawn oil to supply the 

 Fish Hatcheries, and it seems probable that this may have 

 something to do with the decrease in the number of species 

 living in the lake. 



Lake Metagoshe: At the western edge of the mountains. A 

 large shallow lake, the largest of the twenty-six lakes in the 

 region. It resembles L'psilon in the character of the shores 

 and in the gravel and marly bottom. The water was clearer, 

 but had some of the same green algae. A stop here of a few 

 minutes discovered only four species, but a more extended 

 examination would probably result in a larger number. 



Carpenter Lake: Of fair size, with reedy margin. Live 

 snails of five species occurred in numbers. 



Miscellaneous localities: North of Bottineau a few snails 

 were taken from a spring brook flowing south. At Kelvin, 

 north of Dunseith, some shells were taken from debris at the 



