40) ; College of Forestry 
INSECTA. 
Dragon-fly (Basiewschna janata)  Dragon-fly (Tetragoneuria cyno- 
nymph. sura) nymph. 
HIRUDINEA. 
Leech (Placobdella picta). Leech (Glossiphonia stagnalis). 
Leech (Glossiphonia fusca). Leech (Erpobdella punctata) . 
On the lakeward side of Zone D, where the Water Willow 
and Bulrush (Scirpus occidentalis) were abundant, many 
clams were observed in water from two to three feet in 
depth, on a hard, sandy bottom. All were of one species, 
Elliptio complanatus. 
Station II. PENoweaLy Pornt (Frertp Nos. 264-5, 
283-4). 
This point extends some distance into the lake, having sta- 
tions I and III on either side. The water is shallow for a 
Ay 
\= 
ey bone = 
Soa Me boty ht 
1 
tN 
\ 
Vig. 7. Diagrammatic map of the vegetation in bay between Fitzgerald 
and Milton points. 2, 3, 4, 5, 8, 9 depths of water. 
.Scirpus occidentalis. * Pontederia cordata. 
AScirpus americanus. 1. Typha angustifolia. 
+Potamogeton natans. Y. Carex. 
0 Castalia odorata. ! Decodon verticillatus. 
0 Nymphwa advena. C. Sparganium eurycarpum. 
A. Sagittaria latifolia. b. Cephalanthus occidentalis. 
X. Dianthera americana. 
