T A B L E I I
The number of nuclei in central sagittal sections through the embryos at the very onset of gastrulation
and their ratio in the species compared
Species
Number of nuclei
in a section
Number of
sections counted
D a t a compared
Ratio corrected to
the relative thickIndex of significance of the average Author
(M±m)
Number of
sections counted
ness of sections values compared (t)*
Amhystoma
mexicanum
279 ± 5 1
10
Ambystoma
Triturus
2 1
10-5
Dettlafî
Trituras
vulgaris
200 ± 5 - 6
8
Rana terrestr.
Triturus
3 0
22-3
»»
Rana terrestris
356 ± 4 - 3
10
Rana terrestr.
Ambystoma
1-4
11-6
»>
Huso huso
381 ±3-7
34
Huso huso
Acip. stell.
1-7
37
Chulitskaya
Acipenser
güldenstädti
300 ± 2 - 5
34
Huso huso
Acip.
güldenst.
1-4
19-5
»>
Ac. stellatus
258 ± 1 0
50
Ac. güldenst.
Ac. stellatus
1-2
1 5 0
»*
Q
« ^ ( M ^ M ^ M m J + ml)