lyiii A Short. Explanation 
Ful G@ va | 
i microfcopical view of the fetus of the Frog in 
an egg newly depofited, and divefted of its white. 
aa A furrow in the middle of the Frog’s body. 
66 Remains, -or rather rudiment, of a yellow 
fpot, which appears in the fkin of thefe 
creatures, even before they are hatched. 
Eady Gai eave 
The fame futus broken into two parts. 
a A protuberance in form of a crefcent, vifible 
on the internal furface of one of the fides; 
in this place the furrow penetrates to a con- 
fiderable depth. 
6 A little hole or cavity in form of a crefcent, 
ferving to receive the foregoing protuberance. 
cc The place where the furrow is very fhallow. 
dd The. furface of the fraGtion, fhewing the 
Frog's body to confift of globular, or {phe-. 
vical grains or particles. 
FT. G.- VIL. 
A.microfcopical view of the young Frog, within 
ats chorion and amnion. 
a A fide view of the Allantoies, with the cho- 
rion and amnion which entirely enclofe the 
foetus. 
& The furrows already taken notice of. 
¢ Superficial clefts of the yellow fpot, obfer- 
vable in the Frog’s egg. 
F 1G. VIII. 
The fame parts, but in another fituation. 
# The coat, called the allantoies dilated. 
Pela, 
Another reprefentation of the fame parts. 
a The allantoies or coat, ftretched out into the 
fhape of a pear, 
FIG. xX, 
The fame parts again, with the foregoing coat 
| extended to its greateft fize and bulk. 
OER (Ci OG 
The fatus of the Frog, as it appears fourteen 
| days after the laying of the egg. 
FA GP xn, 
A microfcopical view of the fame fetus, 
aa The eyes. 6 Its wide mouth. 
cc Fimbricated appendages, which in procefs 
of time are taken in by the body, where 
they conftitute the gills. 
-g The heart. | 
of the TABLES, 
d The extremity of the extius of the inteftine, 
- which forms fome windings and protube- 
rances in the belly. 
ee The tail, of a flefhy fabftance in the mid- 
dle, but membranaceous at the edges, 
J The extremity of the mufcular and cartila- 
ginous part of the tail. 
BeleG. axils 
The fetus of a Frog, thirty-fix days after the 
laying of the egg, exbibing very diftinétly its 
head, two hinder legs and tail. 
a The aperture or opening of the mouth. 
6 The hinder legs and tail. 
dy A Bee DS 
Belt. 
The foetus of the Frog reprefented by Fig. XU. 
of the laft Table, diffetted, and viewed with 
a microfcope. 
aa The lower jaw-bone, of a black horny 
faubftance, and furnifhed with teeth. 
5 The upper jaw-bone. 
c ¢ White papille furrounding the mouth. 
dd A portion of the protuberant eyes. 
ee Four rows of gills on each fide. 
Sf The lungs, one of which is inflated, the 
other collapfed. 
/ Its auricle. 
z The liver and vena cava. 
k The gullet. / 'The gall bladder. 
m The winding of the gullet about the liver. 
n Part of the mefentery, with its blood veffels. 
o The ftomach in the beginning of its growth. 
p The pancreas in its natural fituation. 
g The {mall gut. 
rr Very beautiful double foldings of the in- 
teftines, 
s The ftraight gut. t The podex. 
uu The two hinder legs, which grow beyond, 
or on the outfide of the body. 
x x The fore legs, which lay hid under the 
fkin. yyy Mufcles of the tail. 
zz The membranaceous {kin of the tail. 
PeeGs TH. 
The manner in which the Tadpole cafis it fein. 
a The {mall opening of the mouth, in the 
fkin caft by the Tadpole. 
6 The wide mouth of the Frog. 
cc The two fore legs, which heretofore lay 
hid in the breaft, under the fkin, now di- 
vetted of it. 
lettcisi 2 fs, oa: 
dd ‘The two hinder legs on the point of drop- 
ping their fkins. 
ee Pulmonary veficles, which nature has be- 
{towed on the male only. — 
Sf Two 
Ne Ce a eS a ee 
See Tab. XLVI. No. V.’ 
Fn a ee 
ee ree Re ern 
