IOWA ACADEMY OF SCIENCES 
271 
Some notes on unidentified species. 
Daphnia sp (?) This is a form evidently belonging within the pulex 
group hut resembling more or less the form described by Prof. Forbes of 
Illinois in his Yellowstone Park Report as D. dentifera. It has the same 
prominent two toothed angle on the dorsal outline between the heart and 
eye as described in dentifera but differs therefrom in having the spines 
well forward on the dorsal outline, a single process to close the brood 
chamber rather than two such processes and in having an accessory comb 
present while it is absent in B, dentifera. The form was found only in 
Zoo Lake and the Sixth avenue Bridge pools. 
Ceriodaphnia sp (?) A form closely resembling G. reticulata but dif- 
ering therefrom in having two long, jointed flagella rather than blunt 
ones at the junction of the post-abdomen and abdomen, process for clos- 
ing the brood chamber absent or \erj obscure and seven rather than 
eight anal teeth. Found only at the Zoo, Sixth Ave., Forty-second street 
and Nourse Pond. 
Total findings. 
Sida crystallina 
D’aphnella bracfiyura 
Daphnia pulex 
Daphnia sp(?) 
Simocephalus vetulus 
Moina paradoxa 
Scapholeberis mucronata 
S. angulata 
Ceriodaphnia sp ( ?) 
Bosmina longirostris 
Camptocercus rectirostria 
Dathonura rectirostris 
Alonopsis latissimus 
Alona guttata 
A. testudinaria var. inermis 
Pleuroxus denticulatus 
P. procurvatus 
Macrothrix laticornis 
Chydorus sphaericus 
Dunhevedia setiger 
This brings the list of Iowa cladocera up to 33 determined and 4 unde- 
termined species reported to date, 23 determined and 2 undetermined hav- 
ing been reported in Vol. 3. and 6 determined species in Vool. 4 of the 
proceedings of the academy by L. S. Ross. 
