NO. i;ii4. REVIEW OF THE BAT GENUS HEMIDERMA—IIAHK. 117 



iiieiubnim' is nut incised. It has been stretched so that this point can 

 not now be definitely determined, but I strongly suspect that it is 

 incised as in other members of the genus and that its stretched condi- 

 tion (which enables one to draw the hinder edge out straight) caused 

 Doctor Allen to err. Calcar very slender and weak. 



Ears and tragus. — P]ar deeply emarginate on outer ))order;" inner 

 ])order not as convex as in other species and tip blunt. The tragus is 

 triangular in outline, with the glandular swelling of the inner edge 

 less evident than in anj" of the other species; outer edge notched as in 

 other forms except that there is no "shoulder" near the tip, while 

 there is such a one near the tip on the inner side, something I have 

 not seen in an}^ other specimen that I have examined. 



Nose-leaf. — The nose-leaf is long and slender, brown in color except 

 at the tip and the upper margin, which are pale (possibly from being 

 rubbed). 



The chin has been described and figured as having warts arranged 

 in the usual way, but it has now been so stretched and rubbed that 

 they csui not be distinguished. 



Skull and teeth. — Skull short and relatively broad; brain-case low 

 and widely arched ; audital bullae small ; zygomatic processes of the 

 maxillary long and slender. Teeth essentiall}^ as in II. suh'riifuni in 

 structure, but all of them smaller and their arrangement somewhat 

 different; lines drawn along the outer edges of the canine and premo- 

 lars of the two sides of the upper jaw would be about parallel and 

 would cut off the inner cusp of the first molar; the outer edge of the 

 first upper molar projecting considerably bevond the outer edge of 

 the last premolar so that there is a sudden break in the line of the 

 tooth-row; a space between the first and second premolars of both 

 jaws. Other jaw teeth all close together. 



Re7narJi's. — Ilemiderina castaneum is the most aberrant form of the 

 genus, difi'ering from all the other known forms in its small size and 

 slender build, in the form of the ears and of the maxillary tooth-row, 

 and in the long, slender zygomatic process. The type is a young 

 adult male with unworn molars, but it is much smaller than specimens 

 of other species which are far more immature. 



Mr. Outran! Bangs has recorded the species from Panama,* but the 

 specimens, which are in the Museum of Comparative Zoology at Cam- 

 bridge, prove to have been erroneously' identified and the type remains 

 unique. 



« One ear has been stretched out smooth and when opened backward and laid on 

 the head it appears to be very slightly emarginate; the other is contracted by a num- 

 ber of oblique and transverse ridges radiating from a point about 10 mm. below the 

 tip, which contract the outer edge at that point to form a deep notch. This wrinkled 

 condition appears to have been the normal one during life. 



''Bull. Mus. Conip. Zool., XLVI, p. 213, Jan., 1906. 



