82 
OSTEOLOGICAL GALLERY. 
To this great group, containing five families and the great ma- 
jority of the species, belong all our British species, the largest of 
which, the Noctule [Vesperngo noctula)^ may be taken as a typical 
insectivorous Bat. The most extreme modification of this type is 
represented by the Blood-sucking Bat [Desmodus rvfus), whose 
molars are almost aborted as being practically useless, while its 
incisors are reduced in number to two, which are extremely large 
and gouge-shaped, and peculiarly fitted to cause a free flow of 
blood from their bite (see fig. 40). 
Order V. DERMOPTERA. 
[Case 8. Ill PtiG so-called Flying Lemur [Galeopithecus) , of which a 
l)iv. A.] siieleton is mounted, the radius and ulna are partly joined to- 
Fig. 41. 
Lower Incisors of Galeopithecus. 
gether, in order to render the forearm more rigid ; the hip-bones 
are united below by a long symphgsis pubis’, and in the skull the 
muzzle is broad and flattened, the orbit nearly surrounded by bone, 
and there is a well-developed zygomatic arch. 
The dentition of these peculiar animals is altogether unique, 
especially the lower incisor teeth (tig. 41), which are of a very 
remarkable pattern, being so deeply notched as to appear like 
minute combs. 
