492 FIELD MUSEUM or 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 Interf emoral membrane ; see interfemoral. 



Vacuity A vacant space or opening. 



Ventral Pertaining to the abdominal surface. 



Zonary Resembling a belt or girdle. 



Zygoma or zygoma tic arch The bony arch of the cheek formed by the jugal or 

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



Zygomatic breadth Greatest distance between outer sides of zygomatic arches. 



