TUPAIA JAVANICA. 
posterior numerous sharp protuberances of different length project. The resem- 
blance of the grinders of Tupaia and Mygale is more clearly shewn by a comparison 
of the Plate annexed to the Continuation of Mb. Fred. Cuvter's excefient Essay 
on the Characters for the Genera of Mammalia, contained in the Xllth Volume of 
the " Annales du Museum," witli the Illustrations of the Genus Tupaia given in 
the present Number of these Zoological Researches, than by a long description. 
My gale is also the only genus among the Insectivores which agrees with our animal, 
in having in both jaws single well-defined canine teeth ; but the incisors of Tupaia 
differ essentially from those of all other animals of this family, as will appear in the 
sequel. As far as regards the rostrum of Tupaia, it should be observed, that although 
it is long and tapering, the upper jaw projects but slightly beyond the lower, and is 
not extended into a naked proboscis, which constitutes a peculiar character as well 
in Sorex and Mygale, as in other genera of this family. Of other characters it should 
be noticed, that the eyes in most genera of the Insectivores are minute, or scarcely 
perceptible, while in Tupaia they are large and prominent, The structure of the 
external ear is also entirely different in our animal ; in Sorex, for instance, in which 
this organ is most developed, the antitragus is enlarged to such a degree as to close 
the meatus auditorius, while the helix has a similar disposition, and can be folded 
over it as a double membrane. In Tupaia, on the contrary, it is the tragus which is 
so constructed as to afford a covering to the external passage, while the antitragus is 
a simple eminence in the cavity of the ear ; the helix constitutes a narrow border, 
forming an extensive circuit about the auditory passage, and can only be elevated to 
regulate the admission of sound, without affording an additional covering, as it does 
in Sorex, Tupaia is further destitute of those glands which in Sorex and Mygale 
are placed in the sides of the body, or at the root of the tail, and which by their 
odoriferous secretion constitute a very peculiar character. The form and habit of 
the body, the length and structure of the extremities, and the broadness of the tail, 
give to Tupaia a physiognomy entirely different from that of the Insectivores 
hitherto known. It is this external appearance which has led to its association with 
Squirrels. But a more accurate examination of these animals shews that they differ 
greatly in those characters which constitute a natural affinity ; and to explain this 
difference, it is sufficient to compare the form of the head, the mechanism of the 
feet, the structure of the eyes and ears, and particularly the system of dentition. 
In the latter, Tupaia exhibits considerable affinity to the genus Tarsius. This appears 
not only in the peculiar character of the front teeth, but also in that of the grinders, 
which are covered with high projecting points, separated from each other by longi- 
tudinal and transverse grooves. A comparison of the teeth of the Tarsius bancanus, 
as given in the Plate of Illustrations to the Second Number of these Researches, with 
those of Tupaia javanica, represented on the Plate annexed to this, will exemplify 
