P. carinatus, Müll. 
P. vortex, L. 
P. contortus, Z. 
P. albus, L. 
Segmentina nitida, Müll. 
Neritina fluviatilis, 7. 
Bithynia tentaculata, L. 
Vivipara contecta, Millet. 
LAMELLIBRANCHIATA. 
Dreissensia polymorpha, Pallas. 
Anodonta cygnea, L. “ Freshwater Mussel.” 
Sphaerium corneum, L. 
S. lacustre, Müll. 
7. ARTHROPODA. 
CRUSTACEA. 
ENTOMOSTRACA. 
By D. J. Scourfield, F.R.M.S. 
The following list of the Entomostraca living in Kew Gardens 
is the result of the examination of a series of collections made at 
the end of December, 1901, and in January, May, August and 
October, 1902. It comprises distributed among 
the orders as follows :—Cladocera 21, Branchiura 1, Ostracoda 12, 
nly i 
gardens is extraordinarily rich for such a limited area. But the 
list also contains a few species of more than ordinary Dese 
The chief of these is, perhaps, the blind Harpacticid Belisari 
viguiert, found in the — collected at the bases of the Sissi in 
Bromeliaceous plants, and in the pitchers of the Pitcher plants. 
Another noteworthy species i Pionocypris tur, gida, which no 
doubt been introduced, probably from Australasia. It is the ed 
example of an exo! otic tomes dune found in 
Canthocamptus bidens is a species not previously found in this 
Pleuroxus ad 
iry serrulatus and Pleuro. 
although found elsewhere before being taken at Kew, have not 
hi been definitely recorded as British. Other rare or little 
known tonoa are Ilyocryptus agilis, Alonella exigua, Potamo- 
cypris , Eurytemora lacinulata, E. affinis, and ig ipu 
bistriatus. Mt of value could be done in regard to any of 
