rycea belli_ lays its eggs
before the onset of the rainy season. A female having a snout-vent
length of 110 mm., collected on June 22, 1955, contained 36 ovarian eggs
having diameters from 3.0 to 3.5 mm. The fact that small juveniles were
collected on the same date indicates that this salamander lays eggs over
a period of several weeks in late spring and early summer.

The smallest juvenile examined has a snout-vent length of 17.0 mm. and a
tail length of 7.5 mm. Twelve juveniles from the vicinity of San Juan de
Parangaricutiro have an average snout-vent length of 19.4 mm. and an
average tail length of 9.7 mm. In juveniles the adpressed limbs either
touch or overlap by one intercostal space; in adults there are two or
three intercostal spaces between adpressed toes. Therefore the greatest
number of intercostal spaces between adpressed limbs is found in the
largest specimens. A similar relationship between adpressed limbs (=
length of limbs) and snout-vent length was shown for _Plethodon
richmondi_ by Duellman (1954a). The number of vomerine teeth is
variable; the number of teeth seems to be closely correlated with the
size of the salamander (Fig. 2). A similar correlation between the
number of maxillary teeth and body length was reported for
_Chiropterotriton multidentatus_ by Rabb (1958). In 12 juvenile
_Pseudoeurycea belli_ there are 6-13 (8.8) vomerine teeth, and in 11
adults having snout-vent lengths greater than 90 mm. there are 39-49
(44.0) vomerine teeth. The coloration of the juveniles resembles that of
the adults (Pl. 1).

[Illustration: FIG. 2. Correlation between the number of vomerine teeth
and snout-vent length in 79 _Pseudoeurycea belli_ from Michoacan.]

The differences between this species and _Pseudoeurycea gigantea_ are
minor. Taylor (1939a) distinguished _gigantea_ from _belli_ by the
larger size, fewer intercostal spaces between adpressed limbs, more
vomerine teeth, and absence of occipital spots in _gigantea_. Taylor and
Smith (1945) stated that in life the spots in _gigantea_ are orange
instead of red as in _belli_. Five specimens of _Pseudoeurycea belli_
from Michoacan, including one juvenile, lack occipital spots. In the 34
living individuals that I have seen from Michoacan the spots varied from
deep red to orange. Therefore, of the characters listed by Taylor (_op.
cit._) to diagnose _Pseudoeurycea gigantea_, only the over-all larger
size and smaller number of intercostal spaces between adpres