15 
the numerous problems awaiting solution in connection with 
these animals, but the appearance of males and ephippial females 
of the Cladocera were duly noted and have been referred to under 
the different species. It would be a very interesting piece of 
t 
tanks in the gardens, such as the tank near the Jodrell Laboratory, 
the Victoria regia tank,. &c. Such an investigation would 
undoubtedly throw light on many obscure points relating to the 
bionomics of these creatures. 
PHYLLOPODA. 
: Cladocera.* 
Sida, Straus. 
8. erystallina, O.F.M. Only seen from the lake. Specimens 
fairly abundant i in October. 
Diaphanosoma, Fischer. 
D. brac achyurum, Liévin. A few specimens only seen (in August) 
from the pond in front of Museum No. 1. 
Daphnia, O.F. M. 
D. pulex, De Geer. "Tank near Jodrell Laborato ory. Apparently 
present tiroughout the year, but in very varying abundance. 
ce , 
abundant 31st May, much scarcer 23rd August, and only a 
5b : 
ephippial females in December and August. The males were of 
the typical pulex type with one long trailing process from back of 
abdomen 
D. longispina, O.F.M. Two or three specimens (one with 
ephippium) of a form almost exactly similar to that miya by 
oma on Table XIV., Figure 2 of the Clad. Suec., were 
aine ea from ed lake on 3rd Janua ary. The species has not 
in met with aga 
D. hyalina, Leydig. A small form, about j^ without shell spine, 
only found in the pond in front of Museum No. I. ; 
each collection iret DEI to August, but had apparently 
disappeared in Octob 
Scapholeberis, Schoedler. 
S. mucronata, O.F M. Pond in front of Museum No. I., and 
the lake. All the specimens seen were of the cornuta type. 
They occurred pretty abundantly in the lake in Octoher, several 
carrying ephippia. 
* W. Lilljeborg's “Cladocera Sueciae,” Upsala, 1900. has in the main re 
followed for the nomenclature of this order. 
