NYCTALUS 55 



The head is broad and flat ; the mouth wide ; the muzzle 

 short and obtuse, the width of the face being increased by 

 a number of prominent glandular swellings on each side 

 between eye and nostril. The side of the head as far back 

 as the ear and upwards to above the eye, together with the 

 terminal portions of the muzzle, is very thinly covered with 

 hair. The nostril is tumid at its upper and inner margins, 

 and slightly channelled on its outer side ; the pair project out- 

 wards and downwards, with a concave space between them. 

 The lower lip has a thick triangular mental plate. The 

 upper lip has a thick rounded border, and beyond a deep 

 groove, interrupted only at each angle of the mouth by a 

 fold of skin connected with the ear. The eye is, for a bat, 

 moderately prominent, and situated between the gland and 

 the ear (Plate IV., Fig. i, p. 60). 



The ears, widely separated, are thick, broadly rounded 

 above, when flattened out nearly as broad as long, and 

 extending very little beyond the eyes when laid forward : the 

 outer margin of each is convex and reflected backwards, 

 notched below the tragus with a thickened convex lobe in 

 front of the notch, and terminating anteriorly behind the angle 

 of the mouth, considerably in front of the base of the tragus ; 

 the inner margin is nearly straight above, convex, and turning 

 inwards below, so as to form a moderately rounded basal lobe. 

 The tragus is short, curved inwards, expanded above but con- 

 stricted at its centre, so that it is broadest near the top, which 

 forms a distinctly rounded or reniform head, broad, rather thick, 

 and covered with numerous papillae (Fig. 2, Nos. i and 2, p. 7). 



The wing, attached to the middle of the sole, is large, long, 

 and narrow, the fifth metacarpal being considerably shorter 

 than the third. The post-calcarial lobe is well developed, 

 and the interfemoral membrane ends posteriorly in a salient 

 angle. The tail is much shorter than the head and body, and 

 projects very little beyond the margin of the interfemoral 

 membrane. The thumb is short, and has at its base a small 

 callosity ; the foot is thick ; the toes are strong, and well 

 developed (Plate VII., Fig. i, p. S6 : Plate IX., Fig. i, p. 126). 



There is a single pair of mammae, situated in the pectoral 

 region. 



