200 Bulletin Wisconsin Natural History Society [Vol. 13, No. 4 
ANNOTATED LIST OF ANIMAL SPECIES ON AREA STUDIED 
It is of course realized that the following list does not include 
all the species of animals on this bog. Only those are included 
which were captured on the small area, studied during the months 
of July and August. 
ANNELIDA 
Haemopis lateralis Say. This leech, the only one of the species to be 
observed, was found creeping in the mud along a plank. 
Placobdella rugosa Moore. A large, sluggish leech found on the shell 
of a turtle. 
MOLLUSCA 
Lymnaea palustris Mueller. Largest snail found. Present only during 
July. Many may be seen creeping along the surface of the water. 
Lymnaea elodes Baker. This large snail is generally found buried in 
the very wet bog. 
Planorbis glabratus Baker. Only a few were seen. They seemed to be 
very rare everywhere on the lake. 
Succinea retusa Baker. During July there were as many as two or 
more of these snails on every square inch of surface. About four o’clock 
in the afternoon they would climb up on every grass stem available, and 
remain there until morning. By nine o’clock all were again buried in the 
bog and stayed until the next afternoon. 
CRUSTACEA 
Cambarus diogenes Girard. The larger individuals of this species make 
their burrows from four to five feet deep in the bog (fig. 3), but the smaller 
ones make their burrows from ten to twelve inches in depth, and only under 
the surface of the water. 
ARACHNIDA 
Lycosa helluo Walckenar. Large spider seen July 23 bearing its cocoon 
to a “nest” under a stone. 
Coelotes fidelis Banks. A small spider which spins its web between 
the stalks of the marsh reeds. Only a few of this species were seen. 
INSECTA 
Hymenoptera 
Pelopaeus cementarius sphecidae Comstock. Several of these wasps 
were observed while collecting mud for their nests. 
Prosopis modesta Say. This species was frequently seen flying about 
the purple blossoms of Iris versicolor. 
