HYLA PUNCTATISSIMA
700 i
600 H
TOTAL VIABLE CELLS IN LUMBAR VENTRAL HORNS
500
METAMORPHOSIS
P
A 2 4 6 8 10 12 14 16 18 20 22 P A 2 4 6 8 10 12 14 16 18 P
FIG. 2. Counts from lumbar ventral horns of larvae of Hyla punctatissima
in serial groups of ten
sections. Total number of cells (upper curves) and of pigmented cells (lower curves) at three stages, with
the number of degenerating cells appended. Anterior pole of horn to left, posterior to right; open
circles refer to left-hand lumbar horn, filled circles to right-hand horn. Between the 40 and 46 mm stages,
the posterior half of the ventral horn loses older, pigmented cells and gains younger cells without pigment.
40(
30(
20(
10(
(
90
A R T H U R H U G H E S
700 i
600 H
TOTAL VIABLE CELLS IN LUMBAR VENTRAL HORNS
500
METAMORPHOSIS
P
A 2 4 6 8 10 12 14 16 18 20 22 P A 2 4 6 8 10 12 14 16 18 P
FIG. 2. Counts from lumbar ventral horns of larvae of Hyla punctatissima
in serial groups of ten
sections. Total number of cells (upper curves) and of pigmented cells (lower curves) at three stages, with
the number of degenerating cells appended. Anterior pole of horn to left, posterior to right; open
circles refer to left-hand lumbar horn, filled circles to right-hand horn. Between the 40 and 46 mm stages,
the posterior half of the ventral horn loses older, pigmented cells and gains younger cells without pigment.
40(
30(
20(
10(
(
90
A R T H U R H U G H E S