Pearse—The Parasites of Lake Fishes. 
181 
Piscicola punctata (Verrill) 
Leeches, identified by the writer, occurred as follows: Lake 
Mendota: carp, bluegill, largemouth black bass; Green Lake: 
pumpkinseed. 
Piscicola milneri (Yerrill) 
Found in Lake Michigan on a cisco— Leucichthys hoyi (Gill), 
and the lota. 
Piscicolaria sp. ? 
Professor J. P. Moore identified specimens from the following 
sources: Lake Geneva: rock bass, yellow perch; Lake Pepin: black 
and yellow bullheads, channel cat; Lake Michigan: rock bass, 
smallmouth black bass. 
Placohdella montifera Moore 
Occurrence: Lake Geneva: smallmouth black bass; Lake Pepin: 
carp and hackleback sturgeon. 
Placohdella parasitica (Say) 
Occurrence: Lake Mendota: bluegill; Green Lake: pickerel, 
top minnow. 
Placohdella picta (Verrill) 
Occurred in Lake Michigan on the sucker and perch. 
Lamellibranchiata 
During all the studies described in this paper glochidia were 
never found on any part of fishes except the gills. In Lake Men¬ 
dota the yellow perch was infected with Lampsilis luteola (La- 
mark). In Lake Pepin the yellow perch was infected with Lamp¬ 
silis luteola (Lamark) and Quadrula plicata (Say) ; the sauger, 
with Quadrula metaneura (Say) (‘‘probably”)? Lampsilis recta 
(Lamark), L. ligamentina (Lamark) ; the mud cat, with unidenti¬ 
fied glochidia. 
