26 PALAOSPALAX. 
no longer represented in this island by living species, is 
established by a single fossil m the British Museum, con- 
sisting of a portion of the left branch of the lower jaw, 
(figs. 12 and 13,) containing the three true molars, 1, and 
three premolar teeth, p; it was discovered by the Rev. 
Mr. Green of Bacton, in the lacustrine formation above de- 
scribed at Ostend. 
The size of the fossil, and the obvious insectivorous 
Fig.13. character presented by the sharp cusps with which 
a the crowns of the molar teeth are bristled, might 
naturally lead, in the first instance, to its com- 
parison with the common Hedgehog; from this 
the fossil is distinguished by its relatively larger 
and more complicated last molar, and by the 
smaller and more simple fourth molar in advance, 
which unequivocally represents, in the fossil, the last of 
the series of false molars, whilst m the Hedgehog, the 
corresponding tooth has the same quadricuspid crown as 
the antepenultimate true molar. The form of the jaw 
is, also, different in the Hedgehog, the lower contour, 
beneath the true molars, being more convex. From the 
genera of exotic Hedgehogs, called Centetes, Hriculus, and 
Echinops, the fossil is still more distinct, by the smaller 
number, and larger relative size, the square crown, and 
quinque-cuspid structure of the true molar teeth: from 
Gymnurus it differs in the smaller relative size of the pre- 
molars ; and by the same character it is sufficiently, though 
less markedly, distinguished from Glisorex tana. The teeth 
.of the fossil make a nearer approach to those of Tupaia 
javanica, but differ in the closer approximation of the 
three premolars, and in the small size of the middle one. 
The closest resemblance to the forms and proportions of 
the six teeth preserved in the fossil is found in the family 
