92 GLOSSARY. 
Epiotie (Gr. ez, upon ; ows, otos, the ear)—A bone of 
the skull above the ear. In human anatomy 
the mamé is given to ome Gf the osseous 
deposits in the embryonic petro-mastoid. 
Epiphysis (Gr. efz, upon; phuses, growth).—Portion 
of a bone ossified from a separate centre of 
ossification. 
Epipteric (Gr. ef7, upon ; pleryx, a wing).—Applied 
to a scale-like ossification sometimes found 
lying between the antero-inferior angle of 
the parietal bone, and the great wing of the 
sphenoid bone. Synonymous with a Wor- 
mian bone. 
Episternum (Gr. ¢f/z, upon ; sternon, the breast)—A 
median membrane bone, connected in some 
Vertebrata with the sternum; also termed the 
enterclavicle. 
Ethmoid (Gr. e¢hios, a sieve ; ezdos, shape).—-A bone 
of the skull having its posterior surface per- 
forated, forming the cribriform plate. 
Ethmo-turbinals (Gr. ethmos, a sieve; L. turbo, a 
twining round).—Applied to certain folded 
bones entering into the formation of the 
olfactory chambers of the skull. 
Ethmovomerine plate.—The anterior plate formed by 
the union of the trabeculz in the foetal skull. 
Ex-occipital (L. ex, without ; occzput, the head).—A 
bone of the skull, lying on either side of the 
foramen magnum; in man formed by the 
condyloid portion of the occipital bone. 
