GLOSSARY OF TECHNICAL TERMS. 355 
Epiotic. A bone on side skull, forming roof of each auditory capsule. 
Epiphysis, The original narrow hollow outgrowth of the pineal apparatus. 
Epiplastra. First pair of median bones of the plastron, in turtles. 
Epipterygoid. A slender rod of bone extending down nearly vertically from 
prootic to pterygoid, in some lizards. 
Episternum. Bony rod passing from anterior ends of united epicoracoids. 
Erectile. Susceptible of being raised or erected. 
Ethmoid. A median bone in front of skull. 
Eustachian tubes. Short tube connecting the mouth and tympanic cavity. 
Exoccipitals. ‘Two bones in the back of the skull, one on each side of the 
foramen magnum. 
Exoskeleton. Outer skeleton, or such hard parts on the surface of the body 
as scutes, scales, etc. 
Exserted. Projecting beyond the general level. 
Extensor. A muscle that straightens. 
Extensores dorsi. Wongitudinal or oblique band-like muscles along the back. 
Extralimital. Beyond the limits. 
Facial. Relating to the face. 
Facial nerves. Seventh pair of cranial nerves, supplying the palatine, by 
mandibular and opthalmic nerves. 
Falcate. Sickle-shaped. 
Falciform. Curved like a sickle. 
Fauna. Animals inhabiting any region considered collectively. 
Femoral. Relating to the femur, or proximal bone of the hind limb. 
Femoral pores. A series of pores on inferior femoral region in most lizards. 
Femoral shields. A pair of shields just before the anal pair on the plastron 
of turtles. 
Femoral veins. Veins carrying blood from front of hind leg, which rami- 
fies into the renal portal veins and the pelvic veins. 
Femur. ‘Thigh bone of the hind limb. 
Fenestra-ovalis, An aperture of the prootic. 
Fibula. Smaller outer bone of hind limb. 
Filament. A slender thread-like structure. 
Filiform. 'Thread-form. 
Flexor. A muscle that bends. 
Fontanel. An unossified space on top of head covered with membrane. 
Foramen. A hole or opening. 
Foramen of Monro. A narrow passage connecting the paracoele and diacoele. 
Forehead. Frontal curve of head. 
Forficate. Scissors-like. 
Fosse. Usually grooves in which the nostrils open. 
Fossorial. Adapted for digging. 
Frontal bone. Front bone on top of head, usually paired. 
Frontal plate. Usually a single large scaly plate on top of head between eyes, 
on some serpents. 
_Frontoparietal plates. A pair of scaly plates, behind the frontal, in lizards. 
Fusiform. Spindle-shaped, or tapering at both ends. 
