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Show 386 MR. G. E. DOBSON ON THE GENUS CHALINOLOBUS. [June 1, small naked space on the lip in front of the lower incisors. These elevated sides of the chin are covered with short hairs and enclose a hollow space between. Ears very like those in Miniopterus, short and rather sloped backwards ; the inner margin commences in a long lobule directed backwards ; the margin of the ear is almost regularly convex all round from the commencement of the inner margin to a point in the outer margin opposite the base of the tragus, where it becomes slightly emarginated, and immediately beyond abruptly convex, forming a short erect lobe connected by a low band with a wai t in front at the angle of the mouth, which is continuous with a horizontal lappet of thickened skin extending forwards along the lower lip almost as far as a point opposite the lower canine. With this lappet of the lower lip the outer margin of the ear is thus directly continuous. Tragus semilunate, the inner margin slightly concave, the outer regularly convex, at the base a rather large equilateral triangular lobule very acutely pointed. First phalanx of longest finger short, intermediate in length between that of Miniopterus and that of Vesperugo, terminal phalanx very long, flexed forwards on the under surface of the first phalanx in repose; in this position it extends nearly to the middle of the metacarpal bone. Feet small ; wings to the base of the toes; calcaneum long and straight, extending quite three fourths the distance between the ankle and the tip of the tail; no postcalca-neal lobule. Tail as long as the head and body, wholly contained within the interfemoral membrane. The ears and the face are nearly naked, a few short hairs only appearing on the glandular prominences between the eyes and nostrils ; the fur of the body above and beneath extends upon the wing-membranes as far as a line drawn from the middle of the humerus to the middle of the femur; the interfemoral membrane above and beneath is quite naked, except where a small triangular patch of hair appears at the root of the tail. The fur is tricoloured, the basal third of the hairs black, the middle third white, and the terminal third a beautiful dark silvery grey. This is the arrangement of the colours about the middle of the body ; but the grey is more prevalent towards and on the head, while the dark shades prevail slightly over the grey towards the tail. The integument of the ears and. face pearly white; wing- and interfemoral membranes dusky white, translucent, traversed by well-defined reticulations and parallel lines. The teeth are very peculiar. The inner upper incisors very long, remarkably slender and acute ; the outer incisor on each side fills up the space between the inner incisor and the canine by its broad base ; but its unicuspidate vertically directed summit is very short, and scarcely exceeds the cingulum of the inner incisor. The canines are extremely long and slender, and are directed almost vertically downwards and slightly outwards ; the lower canines are also very slender, but scarcely more than half the length of the upper ones. The upper premolar is very acute and close to the canine |