454 
BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 
|f 
est 
orifice of ovicell- 
cardelle 
median avicularium 
interareolar costule — 
areola 
pi eurocyst 
pivot of avicularium 
"beak 
N x 2-0 
ovicell 
lyrula 
peristome 
-peristomice 
— peristomie 
"'■lyrula 
.areolar pore 
^-rolocyst 
granular pleurocyst 
Fig. 130. — Anatomy of the Sinittmidae. 
