GLOSSARY. 93 
Femoral (L. femur, the thigh).—Relating to the 
femur. 
Femur (L.)—The thigh bone. 
Fenestra ovalis (L. oval window).—An oval shaped 
aperture in the tympanum of the ear into 
which the stapes (or its homologue in the 
lower Vertebrata) fits. 
Fenestra rotunda (L. round window).—A_ small 
round aperture in the tympanum of the 
ear. 
Fibula (L. 7du/a, a buckle)—The outer and smaller 
bone of the leg. 
Fibulare.—A bone of the tarsus articulating with the 
fibula, sometimes termed calcaneum. 
Fontanelle (L. fozs, a fountain).—A membranous 
interval between the bones of the skull, 
through which arterial pulsation may be seen, 
hence its name. 
Foramen (L. an aperture or opening).—A perforation 
or opening by which blood vessels or nerves 
pass through the bones. 
Foramina, p/w. 
Foramina incisiva (L. incisor openings).—Openings 
that remain in the Mammalia between the 
premaxillez and palatine plates of the max- 
illary bones. 
Foramina obturatoria (L. openings to be stopped 
up).—The apertures in the innominate bones 
between the ischia and pubes, and which 
are covered by fibrous membrane. 
