PLATE B. 



Ceriodaphnia rotunda, male (after Kurz). 



C. cdahameHsis. female. 



C. retkidata, post-abdomen of male with opening of vas 



deferens (after Weismann). 



C. consors ? ? 



C. scitula, head of female. 



do., post-abdomen. 



do., antennule of male. 



do., semen cell of male. 



Scapholeberis angulala, adult female; 9a. first foot. 



Schapholeberis armata^ " 



do., view from below. 



Lijrxodaphnia macrotJiroides, youag. 



do., labrum. 



do., antennule. 



do., last foot, purple pigment in lower part. 



