122 
PLESIOSA URIA AND CROCODILIA 
Case. Shelf, 
87 e 
e 
e 
e 
No. 
species to the last, sawn through to show 
the imperfect union between the bones. 
6 basi-sphenoid of Ichthyosaurus from the 
Lias, worn; and sawn in halves to show 
the passage of the carotid artery through 
the bone. 
7 basi-occipital of Plesiosaurus, sawn through 
longitudinally; it shows uncertain indica¬ 
tions of a distinct anterior part. 
8 basi-occipital of Plesiosaurus sawn in halves. 
87 / 
/ 
/ 
1 longitudinal section through six dorsal 
vertebrae of Plesiosaurus, showing the 
epiphyses and the intervertebral spaces, 
from the Lias of 1 Street. 
2 pectoral vertebra of Plesiosaurus, showing 
the broad tubercle for the rib, made partly 
by the neural arch, and partly by the 
centrum. 
3 longitudinal section through two Plesiosaur 
vertebrae * *. 
g 1—2 orbital region of the skull of a Teleosaur 
from the Lias, sawn through longitudi¬ 
nally. It displays frontal, prefrontal, na¬ 
sal, lachrymal, maxillary and malar bones. 
h 1 lower jaw of a small undescribed Teleosaur 
from the Lias of Whitby. 
i 1 femur of a large Teleosaurust from the Lias 
of Whitby. 
* The remainder of the Plesiosauria are in Compartment A in the Lecture- 
room. 
t In the Lecture-room, in Compartment B, are the skull and lower jaw of 
a large Teleosaur us from the Lias of Whitby. 
