SPECIES OF PTEROPINE BAT. 37 
sembling the scales of Lepidopterous Insects, which vary greatly both in form and struc- 
ture according to their position on the wings. Nor is the serrated appearance in ques- 
tion confined to the Bats, although more common among them than in other tribes. It 
is most usual on those hairs which are crisped and woolly, assuming however in the 
more woolly kinds a totally different character, on which the property of felting pos- 
sessed by such hairs evidently depends. It is, however, beside my present purpose to 
enter further into the details of the modifications which occur in the hair of different 
animals: I content myself with having thus lightly touched upon them, with the view 
of recommending them to the attention of the practical zoologist, as well as to that of 
the microscopic observer, who has long been familiar with many of their more remark- 
able appearances. The subject is well worthy of a careful study, both in a structural 
and physiological point of view; as an attentive examination of the different modifica- 
tions, and of the circumstances attending them, is evidently calculated to throw much 
light on many obscure questions connected with the growth and production of hair. 
In conclusion of these somewhat desultory observations, I subjoin a description of the 
remarkable Pteropus which has given rise to them. 
The general colour of the animal is a dull and pale brown, slightly tinged with rufous. 
This extends over the whole of the upper surface, but is rather lighter towards the 
hinder part of the back. On the under surface the colour generally is similar to that 
of the back, but has somewhat of a grey appearance on account of the lighter tips of 
the loose hairs that occur in this situation: on the middle of the belly, where the hairs 
are short, frizzled, and by no means adpressed, they are entirely of a pale ash-colour 
approaching to white. A line almost equally pale with the middle of the under surface, 
and equally composed of loose waved hairs, extends along the under surface of the 
flying membranes immediately behind the fore-arm. The only other deviations from 
the generally sober colouring of the animal are the remarkable shoulder-knots of white, 
and a small and inconspicuous patch of short white hairs placed both before and be- 
hind, at the base of the naked ears. 
The species may be thus characterized : 
Preropus Waitet. 
Pter. pallidé brunneus, posticé pallidior ; ventre albido ; scopd humerali alba magnd. 
Long. tot. 64 poll. ; capitis, 21; expansio alarum, 12. 
Hab. in regione Gambiensi, D. Rendall. 
Oss. Scopa humeralis forsan maribus propria. 
In naming this remarkable Bat in commemoration of an individual who had no share 
in its discovery and by whom it was never seen, I may seem, strictly speaking, to have 
erred ; but it is time that technical zoology should record the name of one who was by 
