76 
NATURAL HISTORY. (Fossils.) 
[north 
the Memoirs of the Academy of Munich, under the name of Crocodilus 
priscus; —ahead of Crocodilus Toliapicus, mentioned by Cuvier as Cro¬ 
codile de Sheppey , and which appears to be distinct from Crocodilus 
JSpenceri , of which the original specimen is likewise deposited here; 
—the head and other parts of the Geosaurus (the Lacerta gigantea 
of Soemmerring) found together with the preceding, and figured 
and described by the last-menfioned naturalist in the Transactions 
of the Academy of Munich; — the interesting groups embedded in two 
slabs of limestone of the well-known Swanage Crocodile (a distinct 
genus) and one of the principal specimens of the Mantellian collection ; 
—the lower jaw 7 and other parts of the cranium, vertebrae, &c., of the 
huge reptile ( Mososaurus Sancti Petri) from the St. Peter’s Mountain 
near Maestricht, presented, in 1784, by the celebrated Peter Camper, 
and figured by Cuvier;—a portion of a species, from Lyme Regis, 
of the remarkable genus of flying reptiles, the Pterodactylus of Cuvier, 
described and figured by Buckland in the Transactions of the Geological 
Society, under the name of P. macronyx: together with a coloured 
cast of Pterod. longirostris of Cuvier from Solenhofen. 
The whole of Case 3 is occupied by the osseous remains of Iguano- 
don, chiefly from the strata of Tilgate Forest in Sussex; a suite 
which, together with the great group of bones from Maidstone embedded 
in Kentish rag, (in the Wall Case on the opposite side of the Room, 
where the whole will ultimately be arranged,) has furnished Dr. Man- 
tell with highly valuable materials for the illustration of that extraor¬ 
dinary reptile, scarcely less remarkable in its osteology than the gigantic 
animal (Wall Case 2) of the'same order, discovered by that naturalist, 
and to which he has given the name of the Wealden Lizard ( Hylceo - 
saurus), to express the circumstance of its occurring in the strata of 
that geological formation. 
In the Wall Cases 4 to 6, of this Room, and in all those of Room 
IV., are arranged the order Enaltosauria, or Sea Lizards, of the sub¬ 
division of which the genera Plesiosaurus and Ichthyosaurus are the 
principal types. Among the species of the former may be particularized 
the Plesiosaurus Haivkinsii , chiefly from the lias quarries of Street, and 
thus named by Mr. Owen in honour of the author of the work in w 7 hich 
most of the specimens are figured and described that formed his col¬ 
lection, now partly deposited in this Gallery ;—the species from Lyme 
Regis, first described by Mr. Conybeare, and named P. dolichodeirus, 
its neck being nearly equal in length to the body and tail united ;—the 
P. rugosus from the lias near Belvoir Castle, presented by H. G. the 
Duke of Rutland, being a unique nearly complete specimen of this 
species;—the specimen of a Plesiosaure, of which an account and figure 
have been given in the Philosophical Transactions for 1719, by Mr. 
Stukeley, who mistook it for a crocodile. 
Room IV. 
In and on the W 7 ali Cases 1 to 5, inclusive, are placed the larger speci¬ 
mens of the various species of Ichthyosaurus, or the fish-lizard. The most 
striking specimens are the I. Platyodon in the central Case, and various 
