IX. TABLE OF CELL LINEAGE OF CIONA. 
?-cell. i-cell. 8-cell. 16-cell. 24-cell. 32-cell. 48-cell. | 6+-cell. 
3 : = 
1- Ectoderm | | Up 
| | Fi 
i - 9 ~ T 2 2. 
| : 4*3 = Ectoderm (+ Nervous ?) = 
| A7-*— Nervous 
db me —— A75 = Ectoderm 
| | 47-8 Mesenchyme 
"7 = Ectoderm (+ Nervous 2) 
8 — Nervous 
E 
= 
o 
o 
= 
= 
ge \ | EE. C aë-5 = Chorda 
45-6 = Endoderm 
/| AD? A a- = Chorda E 
E | 49-3 = Endoderm = 
Ovum/ N | | — Ectoderm | | = 
N | ^ D-3 = Eetoderm | 4 
\ | = D’-+— Neuro-museular | = 
= Mesenchyme | 
v | DA 
= Neuro-muscular 
I 
ca 4 m | 
= D’-" = Ectoderm + Neuro-muscular | : 
| D'# = Mesenchyme | 
Elm. 
N 
X 
| | 
c 
I 
"NUTYNI 
RC d'-11 — Chorda | 
d’-12 — Mesenchyme 
BC? — Left half) | | 
(3-4 = Endoderm | | | 
EA ! | | 
2. — In this Table the n for only the right half of the egg in the 4-cell and subsequent stages. The complete lineage for the Ly | 
eft half of the egg may be sed by substituting B for A, and C for D in tie Table. ont 
