60 
POPULAR SCIENCE REVIEW. 
dactyles and Birds. So that we may say that this group 
which I had formerly in mind when using the name Ceteosauria 
demonstrates that certain Dinosaurs approximate to both those 
groups, and may have possessed the vital organization of a bird. 
Hence Dinosaurs are to Crocodiles what Birds are said by 
evolutionists to be to Lizards. 
Thus I have endeavoured to bring together not merely 
strings of names of animals in which the beautiful museums of 
Germany and Vienna are rich, but have tried, by a touch of 
the scientific wand, to make them unfold their structure and 
history, and live again, not as mere dry bones, but clothed with 
a power of engendering truths. 
EXPLANATION OF PLATE II. 
Fig. 1. Right side of a generalized Dinosauriam skull, restored chiefly from 
a figure of Hypsilophodon, by Professor Huxley, and partly 
from Scelidosaurus and other materials. 
Fig. 2. Outline of the brain-cavity of Iguanodon in the middle-line of the 
skull, after Mr. Hulke ; the large size and upward extension of the 
optic lobes is more remarkable than in Teleosaurus, but the form 
of the brain-cavity is most like that of Ichthyosaurus. 
Fig. 3. Axis of Iguanodon, from the Wealden Beds, showing the odontoid 
process and the two tubercles for the rib. 
Fig. 4. Early cervical vertebra, with cervical rib of Zanclodon, from the 
Trias of Wiirttemberg. 
Fig. 5. Dorsal vertebra of Iguanodon, showing that the attachments of the 
rib are entirely on the neural arch. 
Fig. 6. Sacrum of Iguanodon, seen from the visceral surface, consisting of 
five vertebrae, anchylosed together. 
Fig. 7. Mid-caudal vertebra of Iguanodon, showing the long neural spine 
and large chevron bone. 
Fig. 8 . Centrum of vertebra of Ornithopsis, showing the cavity for the air- 
cell which excavates the body of the vertebra. 
Fig. 9. Fore-limb of Morosaurus, after Professor Marsh. 
Fig. 10. Hind limb and pelvis of Morosaurus, after Professor Marsh. 
Fig. 11. Ilium of Alligator, a. p. The anterior process. 
Fig. 12. Ilium of Thecodontosaurus, placed for comparison with the Alli- 
gator. a. p. The anterior process. 
Fig. 13. Ilium of Iguanodon, after Owen and Huxley. The Ilium of Mego- 
losaurus is intermediate between this type and that of Moro- 
saurus, shown in fig. 10. a. p. The anterior process. 
Fig. 14. Femur of Iguanodon, after Professor Owen. 
Fig. 15. Tibia of Ilylseosaurus, after Mr. Hulke. 
Fig. 16. Tibia of Coelosaurus, after Professor Leidy. 
Fig. 17. Distal end of Tibia and Fibula in Ornithotarsus, after Professor 
Cope, showing their union with the astragalus and calcaneum. 
