Juday—Studies on Some Mountain Lakes. 
785 
swampy meadow west of Upper lake and in a few places along 
the edges of the lakes. Also Batrachium trichopbyllum grew 
in some of the pools of the swampy meadow as well as in a 
few places in the lake. 
There was a comparatively small amount of phytoplankton. 
It consisted chiefly of diatoms, such as Fragilaria, Asterionel- 
la and Melosira. A small portion of it was made up of Pro - 
toccoccus and Staurastrum. 
ZOOPLANKTON FORMS. 
The following animal forms were found in the plankton of 
the lakes: 
Rotifera. 
Anurea cochlearis G >sse. 
Anurea aculeata Ehr. 
Notholca longispina Kell. 
Triarthra longiseta Ehr. 
Polyarthra sp. 
Asplanchna sp. 
Copepoda. 
Diaptomus judayi Marsh. Cyclops albidus Jurine. 
Cyclops pulchellus Koch. Cyclops viridis americanus Marsh. 
Cyclops serrulatus Fischer. 
Cladocera. 
Vaphnia hyalina richardi Burckhardt. 
Latona setifera O. E. Muller. 
Drepanothrix dentata Euren. 
Eurycercus lamellatus O. E. M. 
Qamptocercus rectirostris bisermtus Schoedler. 
Alona affinis O. E. M. 
Alona guttata Sars. 
Graptoleberis testudinaria Eischer. 
Pleuroxus procurvatus Birge. 
Chydorus sphaericus O. E. M. 
The following Cladocera were obtained from pools in the 
swampy meadow west of Upper lake:— 
Daphnia pulex DeGeer. 
ScapJioleberis mucronata O. E. M. 
