492 Field Museum of Natural History — Zoology, Vol. XI. 



Type [of species] — The specimen upon which has been based the first recognizable 

 description of the species or subspecies which conforms with the rules govern- 

 ing zoological nomenclature. 



Type locality — The exact locality where the type of the species was collected. 



Unicuspid — Having a single cusp or point. 



Uropatagium — Interfemoral membrane; see interfemoral. 



Vacuity — A vacant space or opening. 



Ventral — Pertaining to the abdominal surface. 



Zonary — Resembling a belt or girdle. 



Zygoma or zygomatic arch — The bony arch of the cheek formed by the jugal or 

 malar bone and the zygomatic process of the squamosal; see chart, p. 12. 



Zygomatic breadth — Greatest distance between outer sides of zygomatic arches. 



