54 
ICHTHYOSAURIA FROM THE 
with those exhibited in Cabinet IX., a total of 16 associated 
series. 
The University has been indebted to the Rev. H. G. Day, 
to the late Lucas Barrett, Esq., to Charles Montagu Doughty, 
Esq., to C. Dewick, Esq., to J. F. Walker, Esq., and other 
gentlemen, for the gift of Ichthyosaurian specimens. But 
the bulk of the collection was gathered by Mr William Far- 
ren, and purchased from him. 
The remains afford evidence of the existence of at least 
four or five distinct species in the Cambridge Upper Green¬ 
sand. The finest of these, exhibited in Cabinet IX., shelves 
a, b, C, somewhat resembles the figure given by Prof. Owen 
of a trunk vertebra of Ichthyosaurus campylodon, and for 
that series Mr Carter’s name may be retained. But neither 
teeth nor vertebrae afford the best characters for species, 
though with care the vertebrae might be made to yield dif¬ 
ferential characters; and Mr Thomas Hawkins, to whom the 
University is indebted for the gift of most of the Liassic 
Ichthyosaurs in Compartment q of the East Room,—with 
the insight which comes from daily familiarity,—in his 
memoirs on Ichthyosauria and Plesiosauria, drew distinctive 
characters from the limbs. The provisional species to which 
the remains must be referred will be founded on the humerus 
and femur. 
CABINET IX. 
Ichthyosaurus. 
[Associated series illustrative of species.] 
Shelf. 
a 
No. 
1—4 
Caudal vertebrae. 
b 
1—5 
Late dorsal vertebra?. 
c 
1,2 
Late dorsal vertebrae. 
3—4 
Mid-dorsal vertebrae. 
5—7 
Early dorsal vertebrae. 
These bones were found associated. They 
are arranged in their natural sequence. 
