Classification of Species Collected. 281 
The total number of species and varieties in the foregoing 
list is sixty-three, distributed as follows: 
Holopediidse. 1 
Sididse. 5 
Daphniidse. 16 
Macrothricidse. 9 
Bosminidse. 2* 
Lynceidse. 28 
Polyphemidse. 1 
Leptodoridse. 1 
63 
It is not impossible that the forms described as Daphnia 
JSchoedleri, Sars, and D. pulex , var. pulicaria, Forbes, are really 
the same. More than two varieties of D. Kahlbergiensis , Schdl., 
might have been enumerated, and almost every lake has its 
own variety of D. hyalina , Leyd. Among the Lynceidse the 
several varieties of Chydorus sphoericus were noted but their 
distribution was not determined. These were the forms, (7. 
coBlatui} Schdl.; punctatus, Hellich; nitidus , Schdl., and minor. 
* Besides several unidentified forms. 
