- 
4 Report Brit-Assoc: 1874. Plate 4. 
1. Mastodon saurus. 2. [Mastodons auries. 
Upper Surface. Under Surface. 
aa 
eS 
\ SSS 
=) 
} 
OO 
eo 
3. Trematosaurus. 4. Trematosaurus. 
Upper Surface. < Under Surface. 
oe 
Enaraved by Chat Ineram. 
