194 BULLETIN 57, UNITED STATES NATIONAL MUSEUM. 



Remarks. — The members of the family Myzopodidse may be at once 

 recognized by the sessile adhesive disks on sole and thumb, and the 

 large ear with its tragus adnate to the conch, and its meatus partly 

 closed by the unique mushroom-shaped process. The skeleton is, as 

 pointed out by Thomas, remarkable for its lack of special modifica- 

 tions. In general structure, however, especially in the form of the 

 humerus and shoulder joint, it unquestionably agrees closely with the 

 Natalidse and Thyropteridse, and I fully agree with Mr. Thomas that 

 this resemblance indicates an actual relationship between the three 

 groups. 



Principal subdivisions. — As at present known, the family consists 

 of the single genus Mysopoda. 



Genus MYZOPODA Milne Edwards and Grandidier. 



1878. Myzopoda Milne Edwards and Grandidier, Bull. Soc. Philomath., 



Paris, 7th ser., II, p. 220. 

 1878. Myxopoda Dobson, Proc. Zool. Soc. London, p. 871. 

 1904. Myeopoda Thomas, Proc. Zool. Soc. London, II, p. 2, pi. i, October 1, 



1904. 



Type-species. — Myzopoda aurita Milne-Edwards and Grandidier. 



Geographic distribution. — Madagascar. 



Number of forms. — Only the type species is known. 



Characters. — Dental formula : 



-2 3. 1. -234567-2-2 1-1 3-3 3-3 00 



123.1.-234567 * 3^3' ° l^ pm 3^3' m S^T 38 ' 

 Upper incisors small, simple, with slightly developed cingula, the 

 inner tooth distinctly smaller than outer, which is separated from 

 canine by a narrow space; axis of both pairs in same line; canines 

 simple, without secondary cusps or specially developed cingula ; pre- 

 molars both above and below essentially as in Myotis, pm 2 and 

 pm 3 about equal to upper incisors in size, each separated by narrow 

 spaces from the neighboring teeth ; molars strictly normal, m 3 with 

 well-developed metacone and third commissure, m 1 and m 2 without 

 hypocone. Skull short, broad, and rounded, its general outline when 

 viewed from above strongly suggesting that of Xoctilio. General 

 structure of anterior portion of palate about as in Natalus, the lateral 

 foramina well developed and about as large as median emargination, 

 the width of which is approximately equal to length of a pair of 

 incisors. Pterygoids rather strongly divergent, the hamular pro- 

 cesses unusually long. Basisphenoid pits well developed, circular in 

 outline, narrowed superficially, separated by a flat median space the 

 width of which is equal to about half surface diameter of pit. Audi- 

 tal bulla? and cochlea? rather large, but not peculiar in structure, the 

 bullae covering slightly more than half surface of cochlea?, its inner 

 border not emarginate. Lips wide, the upper extending beyond 

 lower, and somewhat obliquely truncate in front; ear much longer 



