: | Daphnia minnehaha ha 
1. Ephippialfemale = Bae 3 
2. Post-abdomen, ey ee eye Se ee 
8 »~-Antennuleof male aaa a ene CRY 
“x 
Batt Daphnia exilis. ath, 
: x 4, Female. — ; . , 
5. Post-abdomen. — Ait ee Cn 
\ 
hb 
Simocephalus vetulus. . 
6. Caudo-ventral angle of shell. The markings are on the « 
lamina. sake & ns a 2 ie Sia 
7. Marginofshellcephalad. = Ne 
. 8. Post-abdomen. : i 
9, Head. | 
- 
a 
~~ -f 
