THE NAUTILUS. 11 
From the inlet at the northeast of Square Lake, the east side was 
followed to the south, a distance of about 8 miles. The wind blow- 
ing prevented us from doing any dredging, and the bottom is gener- 
ally stone. 
In the south end of the lake the bottom is covered with fine sand 
and afforded very fine dredging ground for 2 or 3 square miles. 
From the shore to 10 feet deep Pomatiopsis cincinnatiensis was very 
common, and a few specimens of Pisidiwm were found from 10 to 
25 feet. Valvata tricarinata and V. sincera were found, but beyond 
the depth of 25 feet all the shells seemed to disappear, and the 
dredge was filled with nothing to collect. The western shore of the 
lake is rocky and the only place visited is Limekiln Point, where I 
have spent a good deal of time in past years. This very interesting 
locality of the Upper Silurian limestone of the Lower Helderberg 
group, contains many fine specimens of fossils, many of them pecu- 
liar to this locality. A very fine collection has been found at this 
place. * * * From Limekiln Point to Eagle Lake every part 
was carefully surveyed, yet nothing of special interest appeared. 
Eagle Lake is the longest of Aroostook Lakes, being about 18 miles 
long and 1 wide. In one place I could not reach bottom with a 
100 foot line. 
Along the north shore I obtained the same species as I found in 
Cross and Square Lakes, and from the deep water I obtained only 
rocks and gravel, and not a fragment of a shell. Where the south 
branch of Fish River enters Eagle Lake, in asand bar, a lot of fine 
living specimens of Spherium striatinum Lamk., and Margaritana 
undulata were collected. Throughout the thoroughfare to Portage 
Lake Spherium striatinum is plentiful * * * * Nothing new 
was added. A good deal of hard work was done dragging the boat 
through the rapids and over rocks and ledges to Portage Lake. 
Portage Lake is in parts surrounded by high hills and a very at- 
tractive place for tourists. The western part is a good finding 
place for mollusks. Pomatiopsis cineinnatiensis Lea, is obtained 
somewhat larger in size as i’ approaches deep water; Planorbis 
companulatus and P. bicarinatus are also of large size, and the 
angles of the whorls in bicarinatus are very sharp. Planorbis de- 
flectus is found at the bend of the lake, very large, from 8 to 9 mm. ; 
Valvata tricarinata and V. sincera are also of good size. 
Near the south and east corner of the lake a colony of good, large 
specimens of Campeloma decisum in 6 inches of water were found. This 
