OXFORD CLAY. 
Ill 
On shelf a Case II. are placed the right and left coracoids, 
right and left scapulae, left humerus, right and left femora, 
hyoid and carpal or tarsal bones. On shelf b are ribs. 
The species, which is new, may be named Ichthyosaurus 
megalodeirus. 
Case. Shelf. 
I a 
b 
b 
b 
b 
b 
b 
b 
CABINET I. 
Specimen. , 
1 — 12 dentary bones and other elongated head-bones. 
1 back part of the skull crushed, showing the 
upper half of the eye, defended with large 
thin sclerotic plates. It apparently shows 
the post-frontal above, the supra-quadrate, 
and the quadrate bones behind. On the 
under side is seen the basi-sphenoid, badly 
preserved, and a bone under the eye-hole, 
presumed to be the articular element of the 
lower jaw. 
2— 3 other bones of the head anterior to these. 
They comprise the premaxillary, showing 
the anterior boundary of the exterior narine 
and extending nearly to the end of the 
snout; the maxillary, the lachrymal, part of 
the nasal, and the malar forming the anterior 
border of the orbit. 
4 right premaxillary. 
5 right nasal bone. 
6 right malar bone. 
7 ? frontal. 
8 undetermined. 
I c 1 anchylosed atlas and axis and third cervical. 
2 four succeeding cervicals, the last two with 
their neural arches preserved and shifted to 
the side of the specimen. The neurapophyses 
are broad and the zygapophyses long and 
oblique, looking forward upward and inward, 
and it results that the passage for the inter- 
