68 
ICHTHYOSAURI A FROM THE 
Case. Comp. Drawer. Specimen. 
J f iii 1—7 a deep vertical groove which superiorly 
encroaches between the ex-occipital fa¬ 
cets in front. 
iii. 2. A large broad basi-sphenoid, [ap¬ 
parently showing that the pterygoid 
bones embraced it behind]. The pos¬ 
terior facet for the basi-occipital bone 
makes an angle of about 45° with the 
palatal surface, and like the opposed 
surface of the basi-occipital has a verti¬ 
cal mesial groove, deepest superiorly, 
iii. 3. Quadrate bone mounted to show 
the exterior surface and the sub-quad¬ 
rate articular condyle, 
iii. 4, ] supra-occipital. This bone is in 
shape not unlike half a link of a chain, 
iii. 5, not determined [1 pro-otic], 
iii. 6, left femur. 
iii. 7, undetermined [? fragment of quad¬ 
rate bone]. 
J f iii 8-—18 8, Basi-occipital bone. 9, distal end of 
quadrate bone. Both these bones indi¬ 
cate a species very unlike the foregoing. 
10, undetermined [? pro-otic]. 11, un¬ 
determined. 12, distal end of humerus. 
13, right scapula mounted to show the 
external side. It corresponds closely 
with Liassic specimens, and approxi¬ 
mates nearly to the Dinosaurian and 
Crocodilian form, differing chiefly in a 
straighter anterior border. 14, 15 are 
early mid-dorsal vertebrae, noticeable for 
the convexity of the outer border of 
the cup, and the prominence of the 
tubercles for the ribs, which are con¬ 
fluent with the border of the anterior 
intervertebral articular cup. The ex- 
