OF THE IGUANODON, AND OTHER SAURIAN REMAINS. 
151 
Figs. 3 and 4. Dermal bones of a discoidal form ; these were disposed in parallel 
rows on each side the dorsal ridge. 
Fig. 5. A thin slice of a dermal bone, viewed by transmitted light, and highly 
magnified. 
Fig. 6. Ribs of the Hylseosaurus. 6“. The first rib. 6 6 . Second rib, et seq., 
forming a series from the first to the eighth, and exhibiting the modifi- 
cations of the bilobed extremity. 
Fig. 7- The coracoid. 
a. The glenoid depression. 
b. Scapular facet. 
c. Foramen. 
Fig. 8. The coracoid and omoplate, or scapula, articulated to each other, and form- 
ing the glenoid cavity or socket for the reception of the head of the 
humerus. 
a. Glenoid facet of the coracoid. 
b. Union of the coracoid with the omoplate. 
c. Foramen for the passage of vessels. 
d. Glenoid facet of the omoplate. 
Fig. 9. Digital or phalangeal bone of the Hyleeosaurus, probably one of the ante- 
penultimate phalanges. 
Fig. 10. The Omoplate. 
d. Glenoid cavity. 
e. Distal extremity. 
Fig. 11. The Humerus of the Hyleeosaurus. 
a. Proximal extremity. 
b c. Radio-ulnar articulation. 
Fig. 12°. Proximal portion of a rib, or costal process. 
a. The spinal bilobed extremity. 
Fig. 12 J . Transverse section of fig. 12°. at w, to show the great expansion of the 
external plane of the rib. 
