480 Wisconsin Academy of Sciences, Arts, and Letters. 
Tahle 8.— Ecological Distribution of Lake Animals Arranged in the Order 
of their Habitats. 
(Abbreviations: a = abundant; c = common; f = freauent; r = rare.) 
(See p. 432) 
1. Shore Line 
Rock 
Gravel 
Sand 
2. Rachion 
Upright 
Recumbent 
Bottom 
4. Shell zone 
N 
p, 
< 
td 
ROCKY SHORE 
Spongilla fragilis.. 
c 
Plumatella repens... 
c 
a 
Dendrocoelium lacteum. 
c 
a 
a 
Polycelis nigra....... 
c 
a 
a 
Erpobdella punctata. 
c 
a 
a 
Nephelopsis obscura. 
c 
a 
a 
Dikerogammarus fasciatus...... .... 
c 
a 
a 
Hyalelia azteca. 
cc 
c 
a 
c 
CO 
c 
a 
Siphlurus alternatus. 
(1 
f 
f 
Ecdyurus maculipennis..... 
cc 
a 
c 
Heptagenia interpunctata.. 
cc 
a 
c 
Baetisca sp.. 
c 
a 
c 
Sisyra umbrata........ 
CL 
Leptocerus ancylus. 
c 
a 
a 
Leptocerus dilutus. 
c 
a 
f 
Polycentropus sp... 
c 
a 
c 
Ithytrichia clavata.. 
cc 
c 
c 
r 
Hydroptila sp...... 
cc 
c 
c 
c 
c 
c 
Agraylea multipunctata.... 
cc 
Q 
c 
cc 
c 
a 
Palpomyia longipennis...... 
c 
r 
a 
a 
a 
r 
r 
Probezzia pallida... 
c 
a 
a 
c 
a 
r 
r 
Chironomus lobiferus. 
c 
a 
a 
c 
c 
c 
c 
a 
a 
Parnid sp. iarva. 
c 
a 
a 
Psephenus lecontei larva... 
cc 
c 
c 
GRAVEL SHORE 
Sparganophilus eisenl... 
a 
c 
a 
a 
Amnicola limosa. 
a 
c 
a 
c 
cc 
c 
cc 
c 
Cambarus propinquu.s.. 
a 
c 
r 
c 
r 
Ephemera varia yg. larva. 
r 
a 
c 
Ephemera variaold larva. 
c 
c 
a 
f 
Argia putrida..... 
a 
CL 
a 
Chironomus cligitatus. 
c 
CC 
c 
cc 
c 
c 
cc 
Stenelmis crenatus Iv. 
c 
cc 
c 
f 
RACHION 
Epieordnila, pi’inr.fips. 
r 
a 
Gomphus fraternus..... 
r 
a 
Molanna uniophila. 
r 
c 
a 
UPRIGHT VEGETATION 
Hydra fnsea. 
cc 
c 
Planaria maculata... 
c 
c 
c 
cc 
cc 
c 
a 
Small Oligochaeta... 
a 
a 
a 
c 
ccc 
ccc 
cc 
c 
a 
Hirudinea... 
a 
a 
r 
a 
c 
c 
a 
f 
Ca.mpeloma. . 
c 
c 
a 
a 
Planorbis parvus... 
a 
a 
c 
cc 
cc 
cc 
cc 
PI. campanulatus.. .. 
a 
c 
c 
c 
c 
PI. bip.a.rina.tns... . 
a 
c 
c 
c 
c 
Hydrachnlda sp... 
c 
c 
a 
c 
cc 
cc 
cc 
cc 
c 
Caenls diminuta..... .. 
a 
a 
c 
cc 
cc 
c 
a 
T.‘5r’brmra vpi’t’lraP*' . 
f 
f 
a 
c 
t 
Ena.lla.gma. a.nt.p.nna.tnm. 
I* 
r 
a 
a 
a 
Nymphiila, sj^i .. .. . 
a 
f 
Platyphylax subfasciatus... 
a 
f 
r 
rjpptopp.lla. nwa.rnwii,. 
c 
c 
a 
cc 
ccc 
cc 
c 
T’ria.p.nndflavpQppns. 
c 
c 
Probezzia glaber... 
c 
c 
a 
c 
cc 
cc 
a 
a 
f 
3. Vegetation 
