' Fie. a / ¢ Se oa arte 
1. Daphnia Tidnnehaha: ‘Male. 1 ee oe) 
hee — minnehaha. Part of feet of first and second | pair. 
8. Canthocamptus hibernicus. Antenna of female. — See 
4. fe hibernicus. Fifth foot of female. ree Aa 
wig «palustris. Antenna of male. s ry ae ie 
6. es trispinosus. Fifth footoffemale. 
Ait. et minutus. Young, AE ON 
8. eas minutus. Nauplius form. 5 ataey ane 
9. Pseudo-sida tridentata. Adult female, antennule, labrum, a 
of shell, and post-abdomen. —— fey , 
10. Daphnia minnesotensis. Young female. | 
Be ee Li. ‘‘ —minnesotensis. Post-imago. 
—  -:12—~— © minnesotensis. Beak. 
Ay J iv 
