1883.] Zoology. 333 
selves to the skeleton and muscular system. The examination of 
one or more genera of all the important types proves the 
Chiroptera to be a very homogeneous group, one of the most 
omogeneous of the mammalian orders. The genus Harpyia links 
together the two suborders usually admitted, since its skeleton 
is that of a roussette, and its viscera those of a bat. The digestive 
apparatus varies in accordance with the habits of the sections of 
the order, but these variations are only those which are physi- 
ologically necessary, such as differences in the shape of the teeth, 
the capacity of the stomach, the length of the intestine, and the 
development of the glands. Apart from variations in relation to 
alimentation, the stomach is constructed according to two types, 
simple and compound. The pancreas is compact in the rousettes, 
diffused in ordinary bats. Among the constant characters of the 
digestive system are the presence of peculiar tridentate tooth- 
like processes (odontoides) near the tip of the tongue, and the 
very general existence of two entirely distinct pairs of sub-max- 
illary glands. The relations of the glottis with the palate are 
similar to those found in the horse and the elephant, and enable 
the bats to keep the mouth open while flying without deranging 
respiration, The larynx is simple and normal, but in some forms 
vocal boxes (caisses) are formed by the modification of the superior 
tracheal rings. There are considerable variations in the structure 
of the accessory glands of the male genital apparatus. All the 
forms of uterus known among mammals can be found in this order. 
In some species the uterus is a single vessel like that of the 
highest primates ; but more generally it is bicornate, with very 
in classification, and this is strengthened by the fact that, since M. 
obin published his first researches, Mr. Watson has shown that 
he Indian elephant has not only two distinct uteri, but two dis- 
tinct vaginæ also. M. Robin has proved that the umbilical 
wi tani though attached to the chorion during all foetal life takes 
T Part in its vascularization, which is entirely of allantoid origin, 
hus all the embryogenital characters show their relation to the 
Primates.— Condensed from Revue Scientifique, 22 Apr., 1882. 
à ZoðrosicaL NoTEs.—Archiv fir Naturgeschichte Jahrg. 49, Heft. 
wot 1883, but received in November or December, 1882), con- 
“ins a lengthy article by Dr. C. Bülow on division and regenera- 
Tar in the worms (Lumbriculus variegatus Gr.). Bonnet cut a 
‘umbriculus into twenty-six pieces, several of which became 
lete animals. Of a Lumbriculus which Bülow cut into four- 
