PLATE IX. 



Fig. 1. Head of Daphnia Schseiferi showing^ alimentary apparatus etc., antennae 

 removed, a, heart. 6, stomach, c, coecum. d, superior antennse* 

 e, eye. /, labmm. ^, jaw. A, B, C, D, £7, one of each pair of feet. 



Fig. 2. Superior antennse. 



Figf. 3. Posterior portion of body. 



