AND CLASSIFICATION OF THE FOSSIL REPTILIA. 
293 
This list does not exhaust the modifications which the Anomodont type assumes. 
It is rather a gi'ade of organization than an order. Its affinities are of the widest 
kind. Its lowest group connects Reptiles with Labyrinthodonts and Amphibians ; its 
intermediate gi-oups have affinities with all the extinct orders of Reptiles; and its 
highest groups make approximations to Mammals which go some way towards demon¬ 
strating their Reptilian origin. 
I would express my grateful thanks to Dr. Henry Woodward, F.R.S., for the 
many facilities afforded me in making this examination of the Anomodont Rejjtilia in 
the Geological Department of the British Museum. 
Fig. 1. 
Fig. 2. 
Fig. 3. 
I'ig. 4. 
Fig. 5. 
Fig. 6. 
Fig. 7. 
Fig. 8. 
Fig. 9. 
Fig. 1. 
Explanation of Pla,tes 9-25. 
PLATE 9. 
Galesaurus and Procolophon. 
Median vertical section of an undescribed Dicynodont skull, showfing bones of 
the median axis of the base of the brain case, the pre-maxillary and dentary 
bone. A dotted line indicates faint markings in the matrix which extend 
between the foramen magnum and the narial region. (See p. 225.) 
Anchylosed basi-occipital and basi-sphenoid from the opposite half of the same 
skull. (See p. 225.) 
Right side of skull of Galesaurus, showing the zygomatic arch formed by the 
malar and squamosal bones, with coronoid process of the lower jaw rising 
above the squamosal. (See p. 277.) 
Palate of the same skull, showing occipital articulation, position of malleus, and 
composite structure of lower jaw. (See p. 278.) 
Superior aspect of the posterior portion of internal mould of the brain cavity 
of Galesaurus enlarged, showing vertical and horizontal semicircular canals 
on the left side. (See p. 278.) 
Posterior aspect of the same specimen, showing the foramen magnum, lateral 
contour of brain case, and semicircular canals. (See p. 278.) 
Skull o'f Procolophon trigoniceps (Owen), seen from above. (See p. 269.) 
Right side of the same skull. (See p. 272.) 
Palatal aspect of the same skull, with the shoulder girdle and right fore-limb. 
(See p. 274.) 
PLATE 10. 
South Afi ican Anomodontia. 
Occipital plate of a small Dicynodont skull, showing its constituent elements. 
(See p. 226.) 
