Mr. A. Murray on a new Bat. 481 
were under the mammalian tongue.” It may be a development 
of the freenum, because two things connected together, although at 
opposite ends, may always be said to be parts of the same thing 
however distant they may be. But I would only observe that in the 
present instance the freenum of the tongue is situated very far back, 
and it seems to me that it may just as possibly be a development of 
the floor of the mouth as of the frenum of the tongue. I do not 
suppose that Dr. Van der Hoeven would think it necessary to look 
elsewhere than to the walls of the cesophagus to find the structure 
from which the elongated papille lining the cesophagus, in the 
hawk-billed turtle for instance, had been developed. There is a 
tendency to similar structure in other parts than the tongue in 
many animals—on the palate and back of the mouth, for example ; 
and I should not be disposed to seek further than the place from 
which it springs for the source of this development. It does not 
extend much further back than the lower canine teeth ; but there is 
a slight plait or perceptible line running on each side all the way to 
the back of the mouth, giving the appearance of a second thin flat 
tongue lying in the hollow of the mouth, tied down like the tongue 
of a crocodile; but the separation here is a mere trace, and it is only 
the fringed margin in front which is free. 
The neck is distinct, and the skin has the appearance of having 
some cellular space between it and the muscles. 
The body is oblong and compact; the ribs descend far, and the 
lower ribs are very large ; the stomach is moderate in size, furnished 
internally with several large transverse folds; the small intestines 
are not very long; there is no ceecum. 
The arms have the thumb and index unguiculate, the rest of the 
fingers are without claws ; the thumb has two phalanges, the rest have 
three phalanges. The thumb is united to the wing by a membrane 
stretching on both sides over the whole of the proximal and half of 
the distal phalanx ; the proximal phalanx of the thumb is shorter 
than the distal. The winged membrane is not extended across the 
back, but is very ample; the winged space between the third and 
fourth fingers, and between the fourth and the body, has in its middle 
numerous longitudinal bundles of muscular fibre interwoven without 
attachments, and one or two similar transverse bundles; these are 
probably for the purpose of assisting in the folding of the wing. 
Along these bundles of muscular fibre the membranous wing is 
closely wrinkled; and there is little doubt that they will also strengthen 
the membrane where they occur. 
The hind feet are uniform and all unguiculate ; they are united to 
the body by an interfemoral membrane, which has a single large 
bundle of muscular fibres stretching obliquely across from the foot 
to the coccyx. 
The testicles are situated under the skin on each side of the male 
organ, and are round. 
There is no tail. 
The length of the whole body, in the specimen from which the 
above description is taken, is nearly 7 inches; the length of the 
