Base of skull of Ram esculenta. Fig. 9,
Skull and teeth of Triton cristatus.
Fig. 10. a, Intermaxillary te e th ; b,
maxillary te e th ; c, vomerine teeth of
Ram pipiens. Fig. 11. Cranium of
Plethodon glutinosus; a, intermaxillary
te e th ; b, maxillary te e th ; c, vomerine
te e th ; d, pterygoid te e th ; e, sphenoid
teeth. Cuvier* and Original.
PLATE 62. A.
Detached teeth of the following species.
Fig. 1. Dendrodus biporcatus : a, summit
of the tooth. (This is a Sauroid Fish.)
Fig. 2. Labyrinthodon conicus. Fig. 3.
Anisodon gracilis. Fig. 4. Cladeiodon
Lloydii. a, side view: b, back view.
Fig. 5. Iguanodon Mantellii: a, outer
side; b, inner side; c, lateral view; d,
an old tooth, fang complete and remains
of pulp-cavity exposed; e, magnified
view of marginal serrations. Fig. 6.
Megalosaurus, Bucklandi. a, side view;
b, hack view; c, magnified view of
serrated edge. Fig. 7. Palteosaurus
platyodon. Fig. 8. a,b . HyleEosaurus(f).
Fig. 9. Goniopholis crassidens. Fig. 10.
a, b, Crocodilus (Suchosaurus) cultridens.
PLATE 62. B.
Fig. 1. Transverse section of the tooth of
the Dendrodus biporcatus, nat. size.
Fig. 2. A portion of the same, magnified
120 linear diameters, a, the large central
vascular or pulp canals. Fig. 3. A
transverse section of the same tooth one
third from its summit. Fig. 4. Peripheral
part of the section, magnified 500
linear diameters; a, terminal branches of
medullary radiating canals; b. thin inflected
layer of cement.
PLATE 63.
Fig. 1.—Tooth of Labyrinthodon (Mastodon-
sauras) Jaegeri, nat. size. Jaeger. Fig. 2.
Two teeth of Phytosaurus cubicodon.
Jaeger. Fig. 3. Part of jaw and teeth
of Phytosaurus cylindricodon : a, socket of
large anterior tooth ; b, tooth with pulp-
cavity exposed ; c, old tooth with new
one rising through the pulp-cavity. Fig. 4.
Three teeth of Phytosaurus cylindrocodon.
Fig. 5. Tooth and alveolar wall of No-
thosaurus. Jaeger.*
PLATE 63. A.
Fig. 1.—Side view of part of upper jaw and
teeth of Labyrinthodon leptognathus. Fig. 2.
Side of part of under jaw of ditto. Figs.
T & 2‘. Teeth of ditto, nat. size, they
are marked * in figs. 1 & 2. Fig. 3.
Under surface of fig. 1. a large anterior
tusk ; b. smaller serial teeth of upper
jaw ; c, vomerine bone and teeth ; d, anterior
palatine opening ; e, posterior palatine
opening. Fig. 4. Fore part of mandibular
ramus of Labyrinthodon pachygna-
thus : a, large anterior tusks ; b, serial
teeth. Fig. 5. Upper surface of ditto.
Fig. 6. Skull and teeth of Pterodactylus
crassirostris. Fig. 7. Two of the supposed
teeth of the Pterodactylus macronyx.
Fig. 8. Inner view of part of upper jaw
of a Monitor Lizard (Varanus striatus).
a. remains of sockets of detached teeth.
Fig. 9. Part of lower jaw of Varanus
variegatus, showing the groups of two or
three successional teeth, behind the large
ones in place. Original.
PLATE 63. B.
Fig. 1.—A transverse section near the summ
it:—fig. 2, the same near the base
Ossemens Fossiles, 4to. 1825, vol. v. pt. ii. Fossile Reptilien in Wurtemberg. 4to. 1828.
of the crown of a tooth of the Labyrinthodon
leptognathus ; both magnified 30
linear diameters. Origiml.
PLATE 64.
Portion of a transverse section of the great
tooth of the Labyrinthodon (Mastodon-
saurus) Jaegeri, magnified 30 linear diameters.
a, Pulp-cavity ; b, dilated termination
of one of the radiated fissures ; c,
inflected fold of cement; d, termination
of the fold. Original.
PLATE 64. A.
Fig. 1.—A reduced view of a section
through the middle of the crown of the
same tooth similarly magnified, a, Radiating
fissures from the pulp- cavity ; b,
converging folds of ossified capsule ; bm,
shorter folds of ditto. Fig. 2. A single
lobule of dentine, magnified 350 linear
diameters, a, basal subdivision of pulp-
fissure ; b, thin layer of cement. Fig. 3.
Terminations of two dentinal tubes, 500
linear diameters. Original. <
PLATE 64. B.
Fig. 1.—Anterior tusk, lower jaw of Labyrinthodon
pachygnathus. Fig. 2. Half of
the transverse section across the dotted
line in fig. I, magnified 50 diameters (a
reduced view). a, Fissures radiating
from pulp-cavity ; b, converging folds of
■ossified capsule ; C shorter folds of ditto.
Fig. 3. Transverse section of base of
tooth of Ichthyosaurus communis, a, Fissures
radiating from pulp-cavity ; b, external
cement. Original.
PLATE 65.
Fig. 1.—Base of cranium and teeth of a
Cæcilia (Epicrium bivittatum). Fig. 2.
Side view of skull and teeth of ditto.
Fig. 3. Side view of skull and teeth of
Amphisbæna alba. Fig. 4. Base of cra-
von. i i .
nium of ditto. Fig. 5. Half of base of
cranium of Ophisaurus ventralis. Fig. 6.
The same of the Tiger-boa (Python tigris).
Fig . 7. Side-view of the skull of the Tiger-
boa ; a, intermaxillary; b, maxillary; c,
palatine; d, pterygoid; e, tympanic pedicle;
ƒ. mastoid. Fig. 8. Skull and teeth of a
Rattle-snake, (Crotalus horridus) ; b,
maxillary bone and poison fang; c, palatine
; d, pterygoid teeth. Fig. 9. Maxillary,
palatine and pterygoid bones and
teeth: a bristle is passed through the orifices
and canal of the poison-fang.
Fig. 10. Base of poison-fang. Fig. 11.
Longitudinal section of poison-fang; a,
pulp-cavity, b b, poison-canal. Fig. 12.
Dissected head of Trigonocephalus lan-
ceolatus: a, base and common stem of
the pinnate lobes of poison-gland; b b,
capsule of the gland laid open ; c, poison
duct, the dotted line shows its course to
the fan g ; d. nasal salivary gland; e, labial
mucous glands. Fig. 13. Base of
skull and lower jaw of a Cobra-di-capello;
a, intermaxillary; b, maxillary and poison
fang ; d, pterygoid with non-veno-
mous teeth. Fig. 14. Hydrophis striatus:
b, maxillary teeth. Fig. 15. Dissected
head of Hydrophis schistosa : a, anterior
temporal muscle; b, middle temporal
muscle; c, posterior temporal muscle;
flf, digastric ; e, articulo-maxillary tendon
which expands, at f , upon the sac of the
poison-gland. Cuvier and Cantor.
PLATE 65. A.
Fig. 1.—Natural size and magnified transverse
section of a poison-fang; a, pulp-
cavity ; b b, dentine; c, thin exterior
cement uniting the folds that include the
poison-canal. Fig. 2. The united folds
of the previous section, magnified 500
linear diameters ;' c, cement. Original.
b