muscles perigonaaiai 
®loin 
post atrio-poral coelom 
mctspleural lymph canal 
. — — — ~ atnopore 
median lower face of the sheath of the notochord 
: to which the dorsal aorta is attached 
floor of atrial chamber 
itaploural lymph canal 
//all of tho po* 
extension ol 
alnoporal 
atnopore 
floor ofatnal chamber 
:®lom 
top of pharynx 
pharyngeal Woouchtv 
wall of intestine 
c®lomic 
funnel 
muscle 
•trio copIoti 
funnel 
muscle 
top of pharynx 
right dorsal artery 
coelom 
muscle 
muscle 
primary pharyngeal bar with ccelomic pouch 
ondary pharyngeal bar or tongue 
coccun. 
ventral ridg 
of pharynx 
metaplci 
mttapli 
metapleur 
position of i 
myotome 
notochord 
myotome 
notochord 
plaited ventral wall of atrium formed by the 
junction of down-grown epipleura left metaplei 
iction 
rntaeles 
posterior «i 
of notochor 
mvotorne 
double ventral fin 
portenor end of sotocn 
?OubU doa H 
,lr, °pore 4 ,IC ra 
Orattentaclei 
left metaplei 
ventral wall of atrium 
