THE FAMILIES AND GENERA OF BATS. 
193 
verse ridge that extends across between pterygoids close to hamulars. 
Audital bullae small, covering less than half surface of cochleae. Ex- 
ternally as in Natalus except that the legs and tail are not elongated, 
the sole and thumb are provided with conspicuous adhesive disks, and 
the muzzle has a slight but evident wartlike elevation above the 
nostrils. 
Species examined.- — Thyroptera tricolor Spix and T. discifera 
(Lichtenstein and Peters). 
Family MYZOPODIME. 
1891. Vespertilionidce (part; Thyropterine division, part) Flower and 
Lydekker, Mammals, living and extinct, p. 665. 
1898. Vespertilionidce (part, Myxopodece) Trouessart, Catalogus Mamma- 
lium, p. 134. 
1904. Myzopodidce Thomas, Proc. Zool. Soc. London, II, p. 5, October 1, 1904. 
Geographic distribution. — Madagascar. 
Characters . a — Humerus with trochiter larger than trochin, the 
relations of the two about as in the Tliyropteridae , 6 surface of articu- 
lation between trochiter and scapula well developed, about as in 
Natalus or Rhinolophus , distal extremity of humerus essentially as 
in Natalus ; second manal digit with fully developed metacarpal 
and “ a short and very slender cartilaginous rod, probably represent- 
ing the proximal phalanx ” (Andersen), third finger with three bony 
phalanges; shoulder girdle normal, the sternum showing no special 
modifications; presternum small, much as in Thyroptera and with 
similarly forward-projecting manubrium; mesosternum slender, flat, 
slightly keeled; foot abnormal, the toes united to base of phalanges, 
thence free but closely approximated, only two phalanges in each toe; 
fibula thread-like c ; pelvis essentially normal, though with pectineal 
process very short, a symphysis pubis in males, boundaries of sacral 
vertebrae distinct ; lumbar vertebrae not fused or in any way specially 
modified; skull short, broad, and rounded, without postorbital pro- 
cesses; premaxillaries fused, complete, isolating two lateral palatal 
foramina ; teeth normal ; thumb and sole with sessile adhesive disks ; 
ears separate, very large, tragus present but fused along its anterior 
edge with ear conch, meatus partly closed by a conspicuous mush- 
room-shaped process unlike anything known in other bats. 
History. — Until recognized as a distinct family by Thomas, this 
group was regarded as a section of the Vespertilionidae. 
a Details concerning several important characters of this family which I 
neglected to note when examining the skeleton in the British Museum, have 
been kindly furnished by Mr. Knud Andersen. 
ft “ Tuberculum majus slightly more projecting than in Rhinolophus , but de- 
cidedly less so than in Pterygistes.” (Andersen.) 
c “ I can not make out with certainty whether the extreme distal end of the 
tibia perhaps shows some trace of ossification.” (Andersep.) 
25733— No, 57—07 m 13 
