Muttkowski—The Fauna of Lake Mendota, 
477 
Table 7.— Showing Distribution by Depth and Character of Bottom 
(Abbreviations: r = rare; f = freauent; a = abundant; c = common) 
(R = Rock bottom; G = Gravel; S = Sand; M = Mud; P = Plant). 
* (See p. 419) 
Name 
Depth in Meters 
Character of Bottom: 
0-1 
1-2 
2-3 
3-5 
5-7 
7- 
Rock 
Gravel 
Sand 
Mud 
Plant 
COELENTERATA 
cc 
c 
a 
f 
f 
ccc 
PORIFERA 
c 
BRYOZOA 
Plumatella repens. 
a 
a 
PLATYHELMIA 
f 
a 
f 
a 
Planaria maculata... 
c 
c 
cc 
cc 
c 
a 
cc 
c 
f 
f 
ccc 
f 
f 
f 
NEMATHELMIA 
f 
f 
a 
Pink Nematode. 
a 
f 
f 
f 
f 
a 
ANNELIDA 
Sparganophilus eiseni,.. 
c 
f 
c 
r 
Lumbriculid sn. 
c 
c 
c 
c 
f 
f 
a 
Small Oligrochaeta... 
cc 
ccc 
ccc 
ccc 
ccc 
cc 
a 
a 
a 
ccc 
Lumbriculus limosa. 
a 
a 
c 
c 
a 
a 
r 
f 
c 
Tubifex tubifex... 
f 
a 
c 
c 
cc 
cc 
c 
ccc 
Limnodrilus clapare- 
dianus.. ... 
r 
r 
a 
c 
cc 
r 
ccc 
HIRUDINEA spp. 
cc 
a 
a 
c 
a 
f 
ccc 
c 
r 
V 
cc 
MOLLUSCA 
Amnicola limosa. 
a 
cc 
cc 
cc 
cc 
c 
a 
c 
cc 
c 
cc 
Physa heterostropha .... 
f 
a 
r 
f 
Phvsa aneillaris. 
r 
t 
d 
f 
f 
Valvata tricarinata. 
r 
f 
c 
f 
f 
r 
r 
r 
Anodonta & Lampsilis .. 
f 
f 
a 
a 
r 
r 
/ 
r 
Sphaerium occidentalis.. 
f 
c 
c 
c 
c 
f 
f 
a 
c 
a 
Ancylus.... 
r 
f 
/ 
f 
f 
r 
r 
r 
d 
Physa gyrina... 
f 
f 
cc 
c 
c 
c 
f 
d 
Pleurocera elevatum.... 
r 
f 
f 
/ 
f 
f 
f 
Campeloma... 
r 
r 
r 
a 
c 
c 
f 
f 
Planorbis parvus ........ 
f 
a 
a 
c 
c 
c 
r 
a 
a 
cc 
Planorbis campanulatus. 
r 
r 
r 
r 
c 
c 
a 
f 
f 
f 
Planorbis bicarinatus.... 
f 
r 
f 
c 
cc 
c 
a 
a 
a 
Limnaea stagnalis. 
r 
r 
T 
f 
a 
a 
f 
a 
f 
Corneocyclas.. 
c 
ccc 
ccc 
CRUSTACEA 
Dikerogammarus fas- 
ciatus... 
cc 
r 
r 
cc 
Cambarus propinquus... 
a 
f 
r 
a 
a 
r 
Hyalella azteca. 
ccc 
c 
'cc 
ccc 
cc 
c 
ccc 
c 
f 
r 
ccc 
HYDRACHNIDA 
Atacinae... 
r 
a 
c 
a 
f 
f 
a 
a 
a 
a 
cc 
Arrhenurinae............ 
a 
c 
cc 
c 
f 
f 
a 
a 
a 
a 
cc 
Lebertiinae. 
r 
r 
a 
r 
r 
r 
r 
r 
r 
r 
a 
Pioninae... 
f 
f 
c 
f 
f 
f 
a 
a 
a 
a 
cc 
Limnesiinae. 
cc 
cc 
cc 
cc 
cc 
cc 
c 
c 
c 
c 
ccc 
EPHEMERIDA 
Siphlurus alternatus .... 
T 
r 
r 
Ecdyurus maculipennis. 
CC 
r 
. 1 
cc 
a 
Optimum 
a'o 
o 
2-3 
0-1 
0-1 
0-1 
0-1 
2-5 
3 
1-25 
1-25 
0-1 
2-6 
2-5 
7-25 
7-25 
1-5 
1- 4 
1-2 
2- 3 
2-3 
2-3 
2-3 
2- 5 
2-6 
3- 5 
5- 9 
4- 7 
4-9 
4-9 
4-12 
6- 25 
0-1 
0-2 
L,2-7 
2-6 
2-6 
2-6 
2-6 
0-15 
0-1 
0-1 
O 
R 
R 
P 
PM 
P 
SM 
M 
M 
RP 
SP 
s 
SM 
s 
s 
s 
M 
3M 
S 
M 
P 
SMP 
SMP 
SMP 
M 
R 
G 
RP 
P 
P 
P 
P 
PM 
