37 
(Mastodon americanu *). Other casts are : — Crania of the 
extinct Pliocene Indian Elephants of the Stegodont (“ plated- 
tooth ” ) type, and the Loxodont (“ lozenge-tooth ” ) types. 
Fig. 39. Restoration of the Pliocene Elephant — 
Deinotherium giganteum. 
The fore-leg and cranium (casts) of Sivatherium, a gigantic 
Giraffe of the Siwalik Formation of India, form notable 
objects. An accompanying drawing of a restoration shows 
the characteristic bilobed canine peculiar to the Giraffidae. 
(See also the modern Okapi in the Lower hall.) 
Two extinct Birds, the Dodo (Didus ineptus ), from 
Mauritius, and the New Zealand Pigeon Goose (Cnemiornis 
calcitrans ), are represented by partial skeletons. 
On the wall are hung some fine slabs of sandstone showing 
Fossil Footprints. These were impressed, many aeons ago, 
on the soft Triassic sands, by the giant Amphibian named 
Cheirotherium (literally “ hand-beast ” on account of the 
shape of the prints). Casts of other footprints, from Connecti- 
cut, show the impressions which were made by small bird- 
footed reptiles. 
Marine Crocodiles (Steneosaurus) are shown both by casts 
and an original skeleton embedded in marlstone. These 
early forms were armoured both above and below. A cast 
of the Jurassic Crocodile, Pelagosaurus typus , in a Table- 
case near the Elephants, shows the slender body and delicate 
scutes of this Liassic form, which in the original consists of 
75 parts, and worked out of the matrix of the rock by Professor 
Deslongchamps . 
