60 THE NAUTILUS. 
Going to Cable Lake, West Orange, I collected Planorbis 
antrosus. The lake is a small one situated on the top of a 
mountain, the shore of which is partly sand and stones. Here 
is the home of the Planorbes, which are covered with algae. 
The Rahway River, in Union Co., was next visited in search 
of Unios. Two specimens of Anodonta cataracta in perfect con- 
dition were secured, but further search failed to produce more 
of that species; but about fifty Unio complanatus were obtained. 
I also collected Physa heterostropha along the bank in company 
with Lymnea palustris, and in the shallows Campeloma rufum 
was found in company with a small variety of Planorbis trivolvis © 
and Sphaerium sp. 
The last three trips to Bloomfield proved the best. The col- 
lecting was done in Great Notch Brook which flows through 
part of the town where it comes from Brookdale. Starting at 
the end of the trolley line and working up stream I found small 
dead Planorbis trivolvis that had been washed in hollows and 
crevices among the stones. . Live ones were gathered farther up 
stream and also Unio complanatus, which I will compare with 
the Rahway River shells later. 
Going still further up stream, I found the first specimens of 
Goniobasis virginica in the shallow water near the bank; also 
broken Campeloma decisum, later two perfect specimens were 
found. The Goniobasis were large specimens ranging up to an 
inch in length, many of them so eroded as to be hardly recog- 
nizable except by the animal itself. Still further up the Gonio- 
basis became more plentiful and also Lymnaea palustris, both 
alive and dead in the drift, which was composed of the dead of 
both and a few valves of Unios. 
The Lymnaeas were found on the stems of water plants and 
also floating on the surface, foot up; the Goniobasis were cling- 
ing to the stones and crawling on the bottom. Both the smooth 
and ribbed variety (multilineata) were found, both banded and 
plain. More Unios were found, so I returned home satisfied 
with the afternoon work. 
On the last trip I found but few specimens of Goniobasis. A 
heavy rain a few days before had made the stream moderately 
high, and the few specimens that I obtained were buried ver- 
