Muttkowski—The Fauna of Lake Mendota. 
481 
Ta-BLE 8.— Ecological Distribution of Lake Animals Arranged in the Order 
of their Habitats —Continued. 
(Abbreviations; a = abundant; c= common; f = frequent; r = rare.) 
1. Shore Line 
3. Vegetation 
sa 
Rock 
Gravel 
Sand 
1 2. Rachion 
1 
1 
Upright 
Recumbent 
Bottom 
4. Shell zone 
'c6 
4-1 
iTi 
UPRIGHT VEGETATION—Contin. 
a 
Chironomus viridis..... ... 
a 
cc 
c 
a 
a 
a 
r 
Tanypus monilis.. 
cc 
cc 
c 
a 
RECUMBENT VEGETATION 
Peltodvtes edentulus 1 v..... 
f 
c 
Berosus sp larva. 
/ 
a 
Haliplus ruflcollis Iv.. 
a 
Mesostoma ehrenberg'ii.. 
a 
f 
BARRENS AND BOTTOMS 
Helicopsyche borealis..... 
r 
r 
a 
f 
f 
cc 
Chironomus modestus... 
c^ 
C. plumosus.. 
a 
c 
a 
c 
c' 
C. tentans var..... 
a 
c 
0 
c 
cc 
C. fulvlventris.. 
f 
a 
a 
a 
c 
C. flavus................................ 
f 
f 
a 
C. abbreviatus... 
c 
Cricotopus trifasciatus... 
f 
f 
a 
c 
Tanypus fasciatus.. 
f 
a 
Stenelmis crenatus ad.. 
a 
a 
a 
c 
a 
a 
c 
Gordius aquaticus. 
c 
c 
c 
Pink Nematode .. 
a 
a 
a 
Lumbriculid sp....... 
f 
c 
c 
r 
Lumbriculus limosa. 
f 
f 
c 
c 
T 
Pliysa heterostropha.... 
f 
f 
f 
f 
f 
c 
c 
P. ancillaris..... 
a 
a 
c 
c 
Valvata tricarinata... 
a 
a 
Anodonta & Lampsilis ......... . 
a 
Sphaerium occidentale................ 
f 
f 
f 
f 
c 
c 
- Ancylus...... 
a 
a 
Physa gyrina. 
a 
a 
a 
c 
c 
Pleurocei a eleva' um. 
a 
a 
SHELL ZONE 
Limnaea stagnalis... 
c 
cc 
Sialis infumata..... 
a 
ccc 
cc 
Leptocerus sp...... 
a 
c 
APHYTAL AREA 
Limnodrilus claparedeianus.......... 
c 
cc 
ccc 
Tubifex tubifex......... 
c 
cc 
ccc 
Corneocyclas idahoensis.. 
f 
c 
ccc 
Protenthes choreus..... 
c 
cc 
cc 
ccc 
Chironomus tentans.. 
c 
ccc 
Corethra punctipennis... 
c 
cc 
ccc 
31~S. A. L. 
