58 AMPHITHERIID &. 
INSECTIVORA. AMPHITHERIID£. 
Fig. 19. 
ld pen EX 
Geri Mh Mmes ib —< 
Ce eee 
= J 
AMPHITHERIUM BRODERIPIL 
Amphitherium Broderipii. OWEN. 
Thylacotherium ss »» Geol. Trans. 2nd Series, vol. vi. pl. 6. fig. 1. 
Tur fossil figured above, of the natural size in outline, 
and magnified in the finished cut, was discovered, like the 
preceding jaws, in the Oolitic slate of Stonesfield, and was 
presented by the Rey. H. Sykes to the Philosophical 
Institution at York, in whose Museum it is now preserved. 
In this, as in the first two specimens of the Thylacothe- 
rium Prevostii, the left ramus of the lower jaw offers its 
inner surface to the observer: it presents at its anterior 
part the sockets of three incisors and one canine, of small 
and nearly equal size, each having a simple fang ; then fol- 
low the empty sockets of three small premolars, each with 
two fangs; to these succeed the three larger premolars, in 
place, each having two fangs protruded to a certain extent 
from their sockets, and fixed by the adherent matrix in that 
position, which proves that they were not anchylosed to 
the osseous substance: for these teeth, no doubt, became 
