348 Agassiz on the Embryology of the Turtle. 
nd, as I 
mon about Cambridge exhibit marked differences in that respect, I se- 
lected these species for my first studies. Chrysemys picta lays always 
between five and seven eggs. I have never observed as few as four, an 
ew 
that they are distinguished at the first glance; for, though they have 7 
questionably to remain another year in the ovary, they are already nearly 
tween its eggs? Upon opening large numbers of youn 
picta it was ascertained, that, up to their seventh year, the 
only eggs of very small size, not distinguishable into sets; 
Field 
g 
‘Now another question arose, When are the eggs fecundated ? 
before it is elevet 
en years 
ung these. 
with a new developmen 
younger than 
