HIPPOSIDERUS TRIDEXS. 
101 
of the membrane, when viewed from above, projects as far forwards as the tip of the 
snout. Anteriorly its mesial line is generally marked by the presence of a minute 
papilliform eminence. 
Ihe Avings arise immediately above the ankles. Ears naked, Avith the exception of a 
feAV fine hairs on the inside margin and at the base of both borders. Upper third of 
humerus haired, rest of the upper surface and the forearm nude; femur and tibia and 
under surface of both limbs nude. Upper surface of foot sparsely covered with fine 
liairs. Interfemoral membrane square. Caudal vertebrse to half of the fifth Avithin 
the membrane, sixth and seventh free. The free portion of the tail clad Avith a feAv 
long fine hairs. 
Hair on upper surface Avhitish, but narroAvly tipped Avith pale greyish brown or slate- 
colour, the white appearing largely through the broAvn. Under surface greyish Avhite. 
Limbs above and below rich yellowish-red or flesh-coloured. Nose-leaf pale fleshy. 
Ears greyish. Wing-membrane brownish. 
Dentition : i. c. pm. m. ~ = 28. 
Measurements. 
cf. 
cf. 
d. 
c?. 
Tor, 
Tombs 
Thebes. 
Minia. 
Sinaitic 
Aden. 
Aden. 
of 
Peninsula. 
Assasif. 
Snout to vent. 
mm. 
mm. 
mm. 
mm. 
mm. 
mm. 
54 
56 
62 
62 
48 
Vent to tip of tail. 
25 
25 
27-5 
27 
23 
Length of head. 
21 
20-2 
22-5 
22-5 
21 
Height of ears. 
18 
19-5 
20 
19-5 
17-5 
Length of forearm. 
... 50 
51-5 
53 
56 
54-5 
49 
,, 1st digit of nianus 
... 9 
10-5 
10 
10 
9-2 
10 
,, 2ud metacarpal . . . 
... 39 
39 
38 
43 
41 
37 
» 3rd „ ... 
... 36 
36 
38-5 
42 
39 
36 
55 4th „ ... 
. . . 34-5 
36-5 
36-5 
40 
39 
35 
» 5th „ ... 
... 30 
30 
30 
33 
34 
29-5 
„ tibia. 
18-6 
20-5 
21 
21 
19-5 
„ foot . 
9-6 
9-6 
10-5 
JO 
9 
Stretch of wing. 
... 280 
281 
293 
325 
315 
240 
Geoffroy St.-Hilaire states that this species was found in the principal underground 
chambers and monuments of Egypt, mentioning among them the Tombs of the Kings 
and the temple of Denderah. In 1880-81 1 found this bat in immense numbers in 
the temple of Denderah, but tAvelve years later, although I penetrated to most of the 
chambers in search of bats, I did not meet Avith a single individual of this species ; this 
Avas doubtless to be accounted for by the excavations and restorations that had taken 
place in the interval. 
