THE FAMILIES AND GENERA OF BATS. it 



Subfamily HABPYIONYCTKEIN^J. 



Geographic distribution. — Known only from Mindoro, Philippine 

 Islands. 



Characters. — Premaxillaries broadly and solidly fused anteriorly 

 (length of median suture considerably less than distance between 

 canines), all their boundaries completely lost in adults; bony palate 

 narrowing rapidly behind tooth rows ; canines crossing each other at 

 nearly right angles when jaws are closed, the lower canines almost 

 in contact with each other, and lower incisors probably absent ; cheek 

 teeth very unusually cuspidate, each molar with five or six distinct 

 sharply pointed cUsps. 



Principal subdivisions. — This subfamily is represented by the genus 

 Harpyionycteris only. 



Genus HARPYIONYCTERIS Thomas. 



1896. Harpyionycteris Thomas, Ann. unci Mag. Nat. Hist., 6th ser., XVIII, 

 p. 243, September, 1896. 



1898. Harpyionycteris Thomas, Trans. Zool. Soc, London, XIV, p. 384, pi. 

 xxx (animal) ; pi. xxxv (skull and teeth). 



1899. Harpyionycteris Matschie, Flederm. des Berliner Mus. fur Naturk., 

 p. 70. 



Type-species. — Harpyionycteris whiteheadi Thomas. 

 Geographic distribution. — Island of Mindoro, Philippine Islands. 

 Number of forms. — Only one species is known. 

 Characters. — Dental formula : 



-2 - 1. -23456- -l-l/ 1-1 ? \ 1- 1 3-3 2 - 2_ 



--(3)1. -2 345 6 7*0-0 V 01 'l-ly''l -l'^" 1 3-3' m 3-3 



28 or 30. 



Upper incisor very large, completely filling space between canines, 

 their form much as in Eumops (p. 257) , that is, each with an obliquely 

 projecting hooked cusp and a broad posterior heel, the two cusps 

 in contact at middle, then diverging outward. Lower incisor a 

 minute spicule, probably not normally present.* Canines slanting 

 noticeably forward, very broad, with well developed cingulum and 

 large posterior secondary cusp, this in the upper canine almost 

 equal in diameter to main cusp, though much shorter. In the 

 lower canine the cingulum forms a second supplemental cusp in 

 front of the main shaft of the tooth. Small upper premolar well 

 developed, though not unusually large, with distinct anterior cusp 

 and narrow posterior heel. The corresponding tooth in the lower 

 jaw (pm 2 ) is much larger, its size when viewed from the side 

 nearly equaling that of the first molar. In form it somewhat 

 resembles the canine though the cingulum and secondary cusp are 



<s In the type it occurs in the right mandible only. 



