Non-aquatic Frog — ATODA 
203 
hind limbs and tail become more developed, 
and the latter reaches about 4 mm. in length. 
The body length, except for the tail, is about 
5 mm. 
On the fourteenth day (Fig. 2b), the egg 
reaches about 9.5 mm. in diameter. The egg 
seems to expand day by day as the larva 
grows in it. The skin of the abdomen, which 
begins to expand from about the seventh day 
of development, swells conspicuously and 
forms a pair of large, balloon- like sacs with 
a great number of blood vessels on the walls. 
On the seventeenth day (Fig. 2c, d, e ) , the 
greater part of both tail and yolk are ab- 
sorbed, and, except for the extreme expansion 
of the abdominal skin, the larva closely re- 
sembles an adult frog. 
On the nineteenth day (Fig. 2/), nearly 
all of the yolk has been consumed and the 
tail is now rudimentary. When the egg is 
carefully removed from the vessel, the gela- 
tinous membrane readily slips off and a mini- 
ature frog jumps free. 
After a few more days all the larvae com- 
plete their metamorphosis, and as soon as 
they leave their eggs, the expanded abdom- 
inal skin contracts to adhere closely to the 
abdomen, showing the same appearance as 
in the adult frog. These young frogs measure 
about 6 mm. in length from the tip of snout 
to the anus. 
ADULT FROG 
Some of the external features of the male 
and female frogs are shown in Figure 3 a—e. 
Both types of frogs are dark brown but 
the male is the darker. The inside of the 
thighs is yellowish-red. In some frogs a line 
line arises from the tip of the rostral and 
extends over the ridge of the back to the toe. 
The tip of the rostral is somewhat rounded 
and the outer nostrils open close to its ex- 
tremity. The distance between the rostrum and 
the point where the upper and lower jaws 
unite is slightly longer than the rostrum re- 
gion. The distance between the extremity of 
the rostrum to the joint of each jaw is approx- 
imately equal to the width of head. The 
pupil is ellipsoid. The circular tympanum is 
conspicuous. Its diameter is about one and 
a half times the length between the hind 
margin of the eye and the fore margin of the 
tympanum, and is slightly shorter than the 
distance between each outer nostril. Close to 
the upper margin of the tympanum there is 
a narrow skin fold. 
In the buccal cavity a pair of internal nos- 
trils, a pair of triangular vomerine tooth 
plates, and a tongue are found. The tip of 
the tongue is bifurcated. The two types of 
frogs have tongues of different shapes; that 
of the large (female) frog is slenderer than 
that of the small (male) frog, and the dis- 
tance between each small process is less in 
the large frog than in the small frog. There 
are minute teeth in the upper jaw but not 
in the lower jaw. The vocal sac is not very 
evident. 
Some skin folds are scattered over the dor- 
sal part of the trunk. Of the fingers of the 
forelimb, the third is longest, then the first 
is next longest; the other two fingers are 
nearly equal in length. Of the toes of the 
hind limb, the fourth is much more prom- 
inent than the others, and the first is shortest. 
The webs are completely degenerated. Many 
rounded protuberances of skin are found on 
the insides of the fingers, toes, palm, and 
metatarsus. The tips of both fingers and toes 
are rounded. The length from the base of 
the tibia to the tip of the longest toe is two 
and a half times that from the base of the 
arm to the tip of the longest finger, and is 
1.6 times the length from the tip of the 
rostrum to the anus. 
DISCUSSION 
The eggs upon which the observations 
were made were collected in the months of 
May, October, and December. They were 
