G en u s EURYOTIS.— B ran ts.
M ammalia.— P la t e XXY.
1 a A view of the upper surface o f the skull of Euryotis irroratus of the natural size.
I b A lateral view of the skull of do. do
1 c A lateral view of the lower jaw of do. do.
1 d A front view of the incisor teeth of the upper jaw of do. do.
l e A front view of the incisor teeth of the lower jaw of do. do.
1 f The teeth of the right side of the upper jaw of do*, of three times their natural size.
. a. The first or anterior tooth ; b. second or middle tooth ; d. third or bind-tooth.
1 g The teeth o f the left side o f the lower jaw of do. do.
a. The first or anterior tooth ; 6. second or middle tooth; d. third or hind-tooth.
The skull is long and rather narrow, its length, from the anterior .extremities of the ossa nasi to.the
hinder aspect of the occipital hone, one inch seven and a half lines ; its breadth immediately behind
the zigomatic arches eight lines. The frontal bones between and in front of the eyes are narrower
than in the other species ; five and a half lines in length. The nasal bones increase suddenly in
width towards their anterior extremities, the increase giving rise to a lateral bulge on each side,
which commences about half way between their two extremities ; length of each bone nine lines.
The molar teeth are six in each jaw, three on each side, and have true fangs ; their crowns are intersected
by narrow, slightly prominent transverse ridges of enamel, which are separated from each
other by intervening grooves. The first or anterior tooth of the upper jaw h a s----- ridges ; the
second two ; the third six, and a small elevated enamel ring which forms the hind-point. The
first tooth of the lower jaw is the longest, and its crown is crossed by four ridges ; the second and
third each by two. The incisors of the upper jaw are strong, and slightly arched, their points cutting
; each is marked anteriorly, with a deep longitudinal groove near its outer edge. Where the
groove terminates there is a slight emargination, in consequence the tip of each tooth appears
more or less bifid. The incisors of the lower jaw slightly arched forwards, and their points bifid and
cutting ; the anterior surface of each tooth with a deep longitudinal groove near its outer edge.
1 h The cæcum, See., of Euryotis irroratus.
a. The small intestines; b. the large ; c. the apical portion of cæcum, without cells.
2 a A view of the upper surface of the skull o f Euryotis unisulcatus o f the natural size.
2 b A lateral view of the skull of do. do.
2 c A lateral view of the lower jaw of do. do.
2 d A front view of the incisor teeth of the upper jaw of do. do.
2 e A front view of the incisor teeth of the lower jaw of do. do.
2 / The teeth of the right side of the upper jaw of do. do.
a. The first or anterior tooth; b. second or middle tooth; d. third or hind-tooth.
2 9 The teeth of the left side of the lower jaw of do. do.
a. The first or anterior tooth; b. second or middle tooth; d. third or hind-tooth.
Length of the skull from the anterior extremities of the nasal bones to the hinder aspect of occipital
bone one inch five lines; width at the hinder extremities of zigomatic arches seven and a
half lines. The breadth of the frontal bones, between and before the eyes rather greater than in
E. irroratus ; length six and a half lines; the length of the nasal bones seven and a half lines,
and they increase a little in width towards their anterior extremities, but there is not that sudden
enlargement which is observed in the corresponding bones of E. irroratus. The first molar tooth
of the upper jaw has its crown divided by three distinct transverse ridges of enamel; the second