rectirostris. 
Moina paradoxa. Abdomen of female from Minnesota. 
Spine from post-abdomen. 
Post-abdomen. 
paradoxa, Head of female, showing: (a) eye with pigment — 
and lenses, (0) supra-cesophageal ganglion, antennule 
with (¢) its muscles, (d)itsnerve, and (e) its terminal 
sensory filaments, (f) the cecum of stomach, (9) 
optic ganglion, (2) stomach, (7) cesophagus, (j) the 
muscles which move the eye, also part of the labrum. 
paradoxa, Antenne. 
rectirostris. Ephippium. 
paradoxa. Ephippium. 
Seminal cell. 
A group of seminal cells less magnified. 
rectirostris. Seminal cells. 
paradoxa. 
rectirostris. 
és 
ee 
Figures 12-5 
se 
punctata. 
pulchella. 
reticulata. 
quadrangula. 
se 
ee 
. >" (Variety...) 
a Post-abdomen. 
oe 
pulchella. 
megops. 
reticulata. 
laticaudata. ae 
rotunda. ‘ 
ire after P. E. Mueller.) 
First foot of male. 
First foot of male. 
Male. (From Weismann). 
Ceriodaphnia rotunda. Head. 
(From Weismann). 
te 
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