Teeth detached of a Capuchin Monkey
{Cebus capucinus). Fig. 10. Teeth of one
side of the upper jaw of a Howler-Monkey
(Mycetes) : i, incisors ; e, canines;
p, premolars; m, molars. De Blain-
ville.
PLATE 115.
A longitudinal section of a lower incisor of
a Galeopitheus, magnified, m, medullary
canal, or continuation of the pulp-cavity
into a division of the crown, 1. entire
incisor, nat. size; i, g, the same slightly
magnified. Original.
PLATE 116.
Fig. 1.—The upper and lower series of
teeth of the left side detached of the Cer-
copithecus Sabteus. Fig. 2. The teeth of
the left side of the lower jaw in situ, of the
Macacus radiatus. Fig. 3. m 1, the first,
and m 3 the last true molar, left side
of the lower jaw of the fossil Monkey
of the Eocene tertiary sand in Suffolk,
{Macacus eocisnus). Fig. 4. Incisors,
canine and first premolar of left side
upper jaw, of the Mandrill, {Cynocephalus
maimon). Fig. 4'. i, incisors ; c, canine;
p , first premolar, of left side, lower jaw
of the Mandrill {Cynocephalus Maimon.")
Fig. 5. Teeth of left side of upper and
lower jaw of a Semnopithecus. Fig. 6.
The same of a Gibbon {Hylobates.)
Fig. 7. Front view of the crown of the
grooved canine of a Spider Monkey
{Ateles). Fig. 8. Front view of the
grooved canine of a Baboon (Cynocephalus).
De Blainville, {figs. 2 # 3, original.)
PLATE 117.
Fig. M—Side view of the teeth, left side,
upper and lower jaw of the male Great
Orang-Utan {Simia Wurmbii). Fig. 2.
Grinding surface of the upper teeth, left
side of the same. Fig. 3. Side view of
the upper teeth, left side, of the female
Simia Wurmbii. Fig. 4. Side view of
the upper and lower teeth, left side, of
the male Kasser Orang, {Simia Morio.)
Each figure is of the nat. size; i, incisors;
c, canines; p, premolars; m, molars.
Original.
PLATE 118.
Fig. 1. A side view with the fangs exposed,
and a view of the grinding surface, of
the teeth of the left side, upper jaw, of
the male Chimpanzee {Simia Troglodytes).
Fig. 2. Aboriginal Australian. Fig. 3.
European. Original.
PLATE 119.
A view of the grinding surface, and a side
view with the roots exposed, of the teeth
of the left side, lower jaw, of, Fig. 1.
male Chimpanzee. Fig. 2. Australian.
Fig, 3. European. Original.
PLATE 119. A.
Fig. 1. A portion of a longitudinal section
of the crown of an incisor of the Chimpanzee,
magnified 450 linear diameters; e,
enamel fibres ; t, dentinal tubes; d', dentinal
cells. Fig. 2. A portion of a transverse
section of the incisor of a Chimpanzee,
near the centre of the crown; a, arese
of dentinal tubes; b, proper walls of the
tube ; i, intertubular substance, magnified
800 linear diameters. Original.
PLATE 120.
Fig. 1.—Part of the skull of a young
Chimpanzee, showing the deciduous and
some of the permanent teeth of the left
side. Fig. 2. Jaws of the left side of an
Orang-Utan, giving a similar view of the
I deciduous and permanent teeth, nat. size.
I In both figures, i 1, is crown of first
I upper permanent incisor; i 2, second
permanent incisor; c, permanent canine;
% p l, first premolar; p 2, second pre-
| molar ; m 1, first permanent true molar;
I m 2, second permanent true molar. The
■ germs of the permanent teeth are not
I exposed in the lower jaw. Fig. 3.
I Grinding surface of first and second
I upper true molars, in different states
H of abrasion of a New Zealander. Fig. 4.
I The corresponding molars of the lower
K jaw. Original.
PLATE 121.
Wig. I. Side view. Fig. 2. Front view
B of the deciduous and permanent teeth
I in the jaws of a child of six years and a
E half: nat size, i 1, first permanent in-
I cisor; i 2, second incisor; c, canine;
| p 1, first premolar or bicuspid; p 2,
E second premolar ; m 1, first true molar;
I m 2, second true molar. Original.
PLATE 122.
Structure of the Human Teeth. Fig. 1.
I A longitudinal section, from side to side
I of a middle lower incisor. 1 a. a trans-
E verse section across the line traversing
p fig. 1- Fig. 2. A longitudinal section,
I from before backwards, of a middle lower
I incisor. 2 a, a transverse section across
m the line traversing fig. 2. 2 b, a trans-
Bj: verse section across the line. Purkirye
I and Fraenkel. Fig. 3. A longitudinal
II section, from before backwards, of a
K lower canine. 3 a, a transverse section,
1 across the line traversing fig. 3. Retzius.
Fig. 4. A longitudinal section of a lower
% ]m’molar, or bicuspis. 4 a, a transverse
I section through the fang, Purlcinje.
I Fig. 5. A transverse section of the
dentine of a bicuspis with undivided
pulp-cavity, Retzius. Fig. 6. A longitudinal
section of a lower molar, nat.
size, showing the general course of the
dentinal tubes. Leeuwenhoek. Fig. 7.
A longitudinal section of a molar. Fig. 8.
A transverse section of the root of the
canine of an aged person, showing hyper-
thropy of the cement, Retzius. Fig. 9.
A longitudinal section of a lower incisor,
which, with fig. 6, gives the scale on
which the other figures are magnified.
The following letters indicate the same
parts in each of the above figures;
c, cement; d, dentine; e, enamel; e"
dusky longitudinal striae of enamel ;
l, contour lines of dentine; o, osteo-
dentine ; v, vascular or pulp-cavity.
PLATE 122. A.
Fig. 1.—Portion of a transverse section of
the crown of a Human tooth, showing at
d, the divided extremities of the dentinal
tubes; and at e the wavy transverse
fibres of the enamel and the flexuous
fissures near the dentine. Fig. 2. A
section taken, almost parallel with the
outer surface of the enamel, near its
dentinal surface, showing the arrangement
of the fibres of the enamel according
to the length of the tooth, and the
rhomboidal figure of the obliquely cut
ends of the enamel-fibres. Purkinje and
Fraenkel. Fig. 3. Part of a section
almost vertical to the outer surface of
the enamel and parallel with its fibres,
showing their transverse markings (Retzius)
: magnified 350 linear dimensions.
Fig. 4. A small part of a transverse
section of dentine, magnified to the
same degree; a, area of dentinal tu b e ;
b, parietes of d itto ; i, intertubular space.
Fig. 5. Portions of five dentinal tubes