40 APPENDIX: NO. XXXIX. 
accompanied by a narrow strip of hair; opposite the elbow and the 
wrist it forms a band of an inch in breadth ; between these points it 
is rather less: that part of the membrane where these hairs are 
implanted on the under surface is tawny, both above and below ; 
the rest of the membrane of the wing and the interfemoral membrane 
are black. The margin of the hair just described on the under 
surface of the wing gradually turns, opposite the elbow, towards the 
knee, and the boundary line is continued through the knee to the 
middle of the bones of the tail, so that the proximal half of the inter- 
femoral membrane is covered with hair; but all the hair on the under 
side of the membranes, as it has generally changed in colour from that 
of the body, so it differs from it in being finer and less closely set ; 
whilst the hair on the upper surface of the membranes, at least the 
greater part of it, all that is continuous with that of the body, differs 
little from this last in character. The membrane is in width before 
the bend of the elbow three-eighths of an inch; behind it nearly 
one inch and three-quarters: it extends to the tips of all the digits 
of the anterior extremity, except the first, where all beyond the 
metacarpal bone is exserted, and this digit alone is armed with a 
claw, shaped like a cat’s. The second digit is tied within an eighth 
of an inch of the third, and as it terminates sooner its weak ‘distal 
phalanx is supported by a still closer proximity to the penultimate 
phalanx of its neighbour. The third and fourth digits are nearly an 
inch and a half apart at their tips, and the last phalanx of each 
appears to be cartilaginous, or is at least bent along the edge of the 
membrane in a direction towards the other. From the tip of the 
fourth to the tip of the fifth is about two inches and a haif, and 
from this to the foot is also about two inches and a half. The edge 
of the membrane reaches the outer side of the foot at the distal 
extremity of the metatarsal bones, and the part of the foot beyond 
these bones is free. Between the foot and the tail, the membrane 
starts from the tarsus along the “ spur,” which supports it for about 
three quarters of an inch, and it finally reaches the very tip of the 
coccyx. The dimensions are :— 
Tip to tip of wings.... 15 inches. 
Muzzle to end of tail.. 42 ,, 
ead yy ieee ails nicer i 
May yoo cores ce Ss, 0:3 oat is 
Length of ear ........ 2 os 
3 
Breadth of ear ...... 
Length of tragus...... 
BIR @ 
23 
The measurements of the bones, as accurately as they can be 
ascertained, with the soft parts still im situ, are :— 
Anterior Extremity. 
Humerus 13 inch. 
Radius e200, 
First Digit, metacarpal +, lst phalanx 2, 2nd including nail 2, 3rd. 
5 3 
Second ,, rr 23, ” a 
Third ” ” 22; ” ” ; 2 7 ” ” &) ” ae ? 
Fourth _,, * Fy) i aeaias 95 ” jy ay. oy Es 
Fifth “: ; i ) ” z; ” ” S > ie 
