A MONOGRAPH OF THE 15ATS OF NORTH AMERICA. 57 



without pit. Aline produced liom the upi)er border of the anterior 

 nasal aperture intersects the Junction of the first premolar with the first 

 molar. The zygoma at the posterior third Avid(uied and elevated at 

 the upper border. The paroccipital and mastoid i)rocesses are rudi- 

 mentary, and the sterno-mastoid region is scarcely depressed. 

 There is no trace of a sphenoidal tongue. The pterygoid process is 

 conspicuous. The tympanic bone is complete and very large, conceal- 

 ing the cochlea. The tympanic bulla is in contact with the basioccipi- 

 tal and basisphenoid; it is not excavate, but incised anteriorly and 

 barely reaches a line which answers to the posterior border of the glenoid 

 cavity. The coronoid process is acuminate and about the height of the 

 horizontal ramus. The posterior border of the ascending- ramus is con- 

 cave. The angle is produced but slightly beyond the condyle, and is de- 

 flected beyond the outer border as seen from above. Tlie masseteric 

 impression is imperfectly limited inferiorly, not reaching* the border of 

 the ramus. The angle touches the plane on which the mandible rests. 

 The lower border of the ramus is markedly concave near the angle. 



Habitat. — All the specimens examined have been collected in the 

 South Atlantic States, except one from Santa Fe, New Mexico. On 

 the authority of Prof. Baird, it has been obtained at Meadville, in 

 northwestern Pennsylvania. At my request, Prof. J. H. Montgomery, 

 of Alleghany College, Meadville, recently kindly collected a number 

 of bats from this neighborhood, but has not succeeded in procuring 

 Corynorhimis. 



Measurements. 



[No. 6062, from Mus. Coinp. ZoiJl.] 



Millimeters. 



Head and body (from crown of head to base of tail) 46 



Length of arm : 



Length of forearm ... - 38 



First digit: 



Length of first metacarpal bone 3 



Length of first phalanx 4 



Second digit: 



Length of second nietacarjial bone 32 



Length of first phalanx 2 



Third digit: 



I.,ength of third metacarpal bone 3.5 



Length of first phalanx 12 



Length of second phalanx 17 



Fourth digit: 



Lengtli of fourth metacarpal bone 34 



Length of first phalanx 9 



Length of second plialanx 9 



Fifth digit : 



Lengtli of fifth metacarpal bone _ 34 



Length of lirst jilialanx 8 



Length of second i)halanx 8 



