382 MR.G. E. DOBSON ON THE GENUS CHALINOLOBUS. [June l, 
and the same peculiarities of dentition occurring in Scotophilus 
gouldii, Gray, and in S. nigrogriseus, Gould, the relationship of 
these species with Chalinolobus was determined. By softening the 
dried integuments and by taking careful measurements of the bones 
remaining in the skins, I was enabled to determine that certain 
unnamed specimens in the collection, preserved in alcohol, belonged 
to the same species respectively, and in them the characteristic 
lobes of the lower lip were found well developed. 
Scotophilus poensis, Gray, from Fernando Po, was, in the same 
manner, found to belong to this group; also S. variegatus, Tomes, 
and a new species, which will be described, from the Cameroon 
Mountains. 
The number of species of this genus is thus raised from one to 
six; and the genus may be defined as follows :— 
Genus CHALINOLOBUS. 
Chalinolobus, Peters, Monatsber. Akad. Wissensch. Berlin, 1866, 
p- 679, and 1867, p. 480 (note). 
Muzzle broad, generally very short and obtuse ; nostrils opening 
sublaterally, forming a prominent flattened central ridge on the upper 
surface of the muzzle, separated from the well-developed glandular 
prominences by a distinct groove on either side. Ears short and 
broad, rhomboidal or ovoid ; the outer margin prolonged forwards 
towards the angle of the mouth; tragus expanded above and curved 
inwards. Lower lip with a distinct fleshy lobule placed near the 
angle of the mouth and projecting horizontally outwards. Wings to 
the base of the toes; tail generally nearly as long as the head and 
body. 
entition.—Inc. 2=2 ; C.—; OS op a) Me 
Dentit Rae 2222 Copal Sor 
6 I-1 2—2 2—2 3—3 
Upper incisors unequal ; the inner incisors on each side long and 
unicuspidate ; outer incisors short, scarcely equalling in vertical ex- 
tent the cingulum of the inner incisors : in species having two upper 
premolars the first is very small, placed in the inner angle between 
the canine and closely approximated second premolar, and visible only 
with the aid of a lens. 
This genus closely resembles Vesperugo in general characters, but 
is readily distinguished by the lobe projecting from the lower lip on 
either side near the angle of the mouth, by the unicuspidate upper 
inner incisors, by the remarkable obtuseness of the muzzle and 
shortness of the head, by the prominent nostrils separated by distinct 
grooves from the well-defined glandular elevations, and in most spe- 
cies by the peculiarly thin membranes traversed by remarkably di- 
stinct reticulations and parallel lines. 
The form of the ear-conch and tragus, the short broad muzzle, 
the long tail generally wholly contained within the wing-membrane, 
and the shortness of the first phalanx of the longest finger, in some 
species, connect it with Miniopterus. 
Distribution.—Continents of the Old World south of the equator— 
