OF THE IGUANODON, AND OTHER SAURIAN REMAINS. 
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PLATE VII. 
Teeth of the Iguanodon ; natural size. 
Figs. 1, 2. Two lateral views of a tooth of the Iguanodon, with the fang termina- 
ting in a point. 
a a. The crown of the tooth considerably worn by use. 
b. (fig. 2.) A cavity in the centre of the tooth filled with calcareous spar. 
Fig. 3. Crown of a tooth with the apex (a) perfect. 
Figs. 4 a , 4 6 , 4 C . Three views of a remarkably fine tooth of the Iguanodon, exhibit- 
ing the peculiar dentary characters of that reptile. 
4°. Lateral view. 
4 b . Section of the fang at the base of the tooth, 
4 e . External and mesial aspects. 
Fig. 5. Magnified view of a portion of the serrated lateral margin of fig. 4. 
Fig. 6. The mesial, and fig. 7, the external aspect of a portion of the lower jaw of 
an Iguanodon, with two teeth attached; and the germs of successional 
teeth (a a). This sketch is intended to convey an idea of the appearance 
of a fragment of jaw of a magnitude corresponding to that of the teeth 
here delineated. 
PLATE VIII. 
The osteological elements of the Iguanodon , so far as at present known. The figures 
are reduced to a uniform scale; the Maidstone specimen afforded the data by 
which their relative magnitude was computed. 
Fig. 1. The right femur or thigh-bone. 
a. Head, or proximal extremity. 
b. Trochanter major, on the fibular or external aspect of the femur. 
c. Trochanter minor, on the tibial aspect ; a transverse section of the 
shaft of the femur at this piace is represented fig. 27. 
d. Inner condyle. 
e. Anterior furrow, or groove between the condyles. 
Fig. 2. The fibula. 
a. The proximal extremity. 
Fig. 3. The anterior, and fig. 4, the posterior view of the tibia. 
a. Proximal extremity, or head of the bone. 
b. Fibular plane of the distal extremity. 
c. Inner process of the distal extremity. 
d. A section of the shaft at this place is shown in fig. 21. 
Fig. 5. This bone is probably referable to the brachial extremity; it is imbedded 
MDCCCXLI 
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