17 
Acroperus, Baird. 
A. harpae, Baird. The lake, pond in front of Museum No. I., 
water-lily pond, and the riverside ditch. 
Alona, Baird (= Lynceus, Lillj.). 
A. affinis, Leydig. Pond in front of Museum No. I. 
A. guttata, Sars. The lake. 
sie Sars. The lake and pond in front of Museum 
o 
Graptoleberis, Sars. 
G. testudinaria, r The lake, water-lily pond, and tank 
near Jodrell Labora 
Alonella, Sars. 
E exigua, Lill eng Water-lily pond. Although 4. exigua 
as recorded as British by Norman and Brady in 1867, it is just 
souls that they "ga not =a have this species but only the 
commoner A. ezcisa, and as n e else seems to have recorded it 
— T. Scott definitely states that all the forms referred to by him 
exigua were actually A. excisa), the e sent may the 
first definite record of the species in this country. 
A. rostrata, Koch. Pond in front of Museum No. I. 
cepe Baird. 
laevis, Si sia z FM in front of Museum No. I., and tank near 
J — Laborato 
x ecd ore Riverside ditch (north of Isleworth 
Ferry Gate). 
P. uncinatus, Baird. Pond in front of Museum No. I. 
neus, Jurine. The lake and the riverside ditch. Although 
iters on our native Entomostraca, so far as I am aware 
under P. trigonellus. 
Chydorus, Leach. 
C. globosus, Baird. Pond in front of Museum No. I., and the 
riverside ditch (south of Isleworth Ferry Gate). A male 7 was seen 
in January from the first-named locality. 
C. sphaericus, O.F.M. Found in nearly every locality examined, 
including the cups formed by the leaves of Bromeliaceous plants. 
Ephippial females were seen at end of May in one of the in 
the winter garden 
BRANCHIURA. 
Argulus, O.F.M. 
oliaceus, Linn. This well-known fish parasite was found 
in the lake by Mr. C. F. Rousselet. 
13757 B 
