114 GLOSSARY. 
anatomy by the squamous part of the tem- 
poral bone. 
Squamo-zygomatie (L. sguama,a scale ; Gr. sugnum, 
I yoke together)—A suture which forms a 
centre of ossification in the fcetal skull. 
Stapes (L. a stirrup)—A stirrup-like bone of the ear, 
htting in the fenestra ovalis. 
Sternum (Gr. sternon, the breast)—The flat bone of 
the breast to which the rib or costal cartilages 
are attached. 
Stylo-hyal.—An ossification in certain Vertebrata, 
which connects the hyoidean arch with the 
skull. The styloid process of the temporal 
bone of human anatomy consists of a fusion 
of Stylo-hyal and Tympano-hyal. 
Styloid (Gr. stulos, a style ; ezdos, shape).—Style-like. 
Applied to certain processes of bones, as 
those of the ulna, radius, and temporal. 
Sub-operculum (L. své, under ; operculum, a lid).—A 
bone in Teleostean fishes forming the ventral 
portion of the skeleton covering the gill. 
Suchospondylia (Gr. swchnos, long ; spondulos, a 
vertebra). — Applied to certain Reptilia 
having elongated and divided transverse 
processes on the dorsal vertebre. 
Suleus (L. a furrow).—A term applied to furrows or 
depressions in bones, eg. the sulcus frontales 
of the frontal bone. 
Superciliary ridge (L. swper, above ; cz/zum, an eye- 
lash)—An eminence on the frontal bone, 
