310 Proceedings of the Royal Society of Edinburgh. [Sess. 
The specimen is undoubtedly a female, for it possesses a spacious brood- 
pouch, containing eleven parthenogenetic eggs, so far developed that in each 
the young Daphnia, with several pairs of appendages, is clearly recognisable. 
Fig. 1. — Specimen I., from the left side. Note the aberrant left antennule (A.). 
B.P., brood-pouch ; P., one of the three dorsal processes of the abdomen, 
x 60. 
The carapace has the configuration of that of a typical female (see fig. 1); 
the dorsum is strongly arched over the region of the brood-pouch, and the 
ventral margin exhibits a regular curvature. It will be noted that there 
is no trace in this specimen of the projection, or of the plumose hairs, which 
are present on the anterior margin of the carapace in males. 
