EMBALLONURIDA 671 
In the Mystacopine division the tail perforates the interfemoral 
membrane and appears upon the upper surface. 
Mystacopsi—This genus includes only M. tuberculatus of New 
Zealand, where, together with Chalinolobus tumorio, it represents 
the whole indigenous mammalian fauna of 
the islands. There are three distinct 
phalanges in the middle finger; the 
greater part of the wing-membrane is 
exceedingly thin, but a narrow portion 
along the forearm, the sides of the body, 
and the legs is remarkably thick and 
leathery ; beneath this thickened portion 
the wings are folded. With the wings 
thus encased, this species is the most sn 
quadrupedal of Bats. Other peculiarities Rie mone ee 
of structure are found in the remarkable js75) — git beak ele 
form of the claws of the thumbs and toes, 
which have each a small talon projecting from its concave surface 
near the base, also in the sole of the foot and inferior surface of 
the leg, as shown in Fig. 317. The plantar surface, including the 
toes, is covered with soft and very lax integument deeply wrinkled, 
Fic. 317.—Pollex and leg and foot of Mystacops tuberculatus, enlarged. (Dobson, 
Proc. Zool. Soc. 1876.) 
and each toe is marked by a central longitudinal groove with short 
grooves at right angles to it. The lax wrinkled integument is 
continued along the inferior flattened surface of the ankle and leg. 
These peculiarities appear to be related to climbing habits in the 
species. 
Fossil Emballonuride.—In the cavern-deposits of Madras remains 
of the existing Tuphozous saccolenus are not uncommon ; while in 
the corresponding beds of Brazil bones of a Molossus, probably refer- 
able to M. temmincki, now inhabiting the same region, are met with. 
1 New name: Syn. Mystacina ; Gray, Voyage of the ‘‘ Sulphur,” ‘‘Mamm.’ 
p. 28 (1843). Preoccupied by Mystacina, Boie, 1822. 
