265 
Taste V.—METAMERISM OF AMPHIOXUS. 
SEGMENTS Vi” 45 VIE 
Somites 
Dorsal nerves VI 
sf 
$ 
4 
Ventral nerves 
Visceral clefts (r.) See |] | 1* 2% 
2% 3% 
1 Possibly representing also a visceral-pouch element. 
2 Club-shaped gland. 
3 M. Mouth. 
The permanent visceral clefts are indicated by asterisks. 
wa 
a 
= 
= 
z 
a 
[S] 
= 
mM 
5 
e| 
= 
2 
G 
Y 
Z 
ti 
= 
E 
= 
mM 
> 
mM 
mM 
5 
© 
= 
= 
El 
Z 
= 
< 
= 
Z 
