new British Entomostraca. . peri 
at its base there are two or three small hairs. The two poste- 
rior thoracic segments are distinctly marked off, and each 
bears a dorsal fringe of very long delicate hairs. 
In the descriptions given by Hartwig and by Keilhack no 
mention is made of the lateral groups of hairs on the post- 
abdomen, and, though these are only visible under a high 
magnification, it is most unlikely that they would be over- 
looked. The presence of these groups of hairs and of the 
Fig. 1. 
Mie 
gy i j 
“in 
Alona protz, Hartwig. 
1. Side-view of female. 
2. Antenne and upper lip. 
3. Postabdomen. 
long dorsal thoracie fringes distinguish my specimens rather 
markedly from the type, but the agreement in other respects 
is so exact that there can be no doubt that they belong to this 
species. The labrum is acutely pointed, which is most 
unusual in the genus Alona, and serves alone to distinguish 
it from the species most closely resembling it. Keilhack 
considers that A. protzi is most nearly related to A. cambouei, 
