38 
Chelo?iia. 
regards individuals and species, and also in the most peifect 
preservation, in the Lias formation. Geographically, they 
enjoyed an exceedingly wide range of distribution, their remains 
having been discovered in the Arctic regions, in Europe, India, 
Ceram, North America, the East Coast of Africa, Australia, and 
New Zealand. Nearly entire skeletons of both young and 
adult animals have been obtained from beds of this age with 
but few of the bones displaced, as may be seen by many 
specimens in the Wall-case. 
Tortoises 
and Turtles. 
Wall-cases, 
Nos. 11 and 
12 . 
Table-cases, 
Nos. 20, 21, 
22 . 
Order VIII.— CHELONIA (Tortoises and Turtles). 
The Chelonia are exhibited in two wall-cases and three 
table-cases placed in the West Corridor (No. 5 on Plan), which 
connects the Mammalian with the Reptilian Galleries. 
A. 
B. 
Fig. 47.— a. Carapace of Trionyx Gergensi (Meyer), from the Lower Miocene of the Mayenee 
Basin, ^ uat. size; nu , nuchal; cl to c8, costals; n\ to rii , neurals. b. The fourth right 
costal plate with the sculpture drawn on a larger scale. 
