LZ THE NAUTILUS. 
was the first place I had any opportunity to see them in any num- 
ber in the north of Maine. From this place I had intended to go 
to Big Fish Lake, about 20 miles west from Portage Lake, but some 
of my provisions were spoiled by hot and rainy weather and I was 
not able to obtain any from the farmers, therefore at the south of 
the lake I engaged a team to transport us to Aroostook River, a 
distance of 10 miles, over a good road. 
Aroostook River is rapid and rocky the whole distance from Ash- 
land to Caribou, and shells are seldom found. Margaritana mar- 
garitifera Lin., are found among the rocks in from 5 to 6 feet of 
water ; a dozen living specimens were obtained in the distance of 40 
miles. Anodonta fragilis lives in the small streams which empty 
into the river. Planorbis bicarinatus and Physa heterostropha are 
sometimes plentiful. Spherium truncatum and a few Pisidia have 
been found. Campeloma decisum were collected in two places, and 
Ancylus tardus Say, was found on rocks in a place near Caribou in 
the summer of 1895. 
After three weeks have been spent in the woods it is pleasant to 
arrive at home again. The specimens collected during this trip 
have not all been identified. 
In past years I have received valuable assistance from Professor 
H. A. Pilsbry. Mr. Bryant Walker, of Mich., sent me a dredge 
which has been of great value, and Dr. V. Sterki has kindly deter- 
mined Pupide, Vertigos and Pisidia. My thanks are due to these 
gentlemen. 
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is still more than we can afford to lose. Our screed upon this topie 
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