GLOSSARY. 125 



Sagit'ta (L. an arrow). The name given to the larger and 



anterior of the two otoliths of the ear in some fishes. 

 Sagittal su'ture (L. sdgitta, an arrow ; sutura, a seam). The 



suture which connects the parietal bones of the skull. 

 Salamandri'dea (Gr. sdldmandra, a salamander). A group of 



the Amphibia. 

 Sali'va (L. saliva, spittle). The spittle ; the secretion of the 



salivary glands of the mouth. 

 Salivary (L. saliva, spittle). Relating to the saliva, as the 



salivary glands by which it is secreted. 

 Sali'vin (L. saliva, spittle). A nitrogenous substance contained 



in saliva. 



Salpin'go-pharynge'us (Gr. salpinx, a trumpet ; pharunx, the 

 pharynx). An occasional muscle passing from the Eu- 

 stachian tube to the pharynx. 



Saphe'na ") (Gr. saphenes, manifest). Applied to a nerve and 

 Saphe'nous j a vein, both near the surface of the skin, and 



passing from the knee to the ankle. 



Sarcolem'ma (Gr. sarx, flesh; lemma, a husk). The sheath of con- 

 nective tissue which surrounds each fibre of a striated muscle. 

 Sar'cous (Gr. sarx, flesh). Fleshy j applied to the contractile 



elements of which a striated muscular fibre is composed. 

 Sarto'rius (L. sartor, a tailor). A muscle passing along the 



front of the thigh from the ilium to the tibia. 

 Saurobatra'ehia (Gr. sauros, a lizard; batrachos, a frog). A 



group of the Amphibia, also named Urodela. 

 Sauropsf da (Gr. sauros, a lizard ; opsis, appearance). One of 

 the three primary groups or provinces of the Vertebrata ; 

 it includes the classes Aves and Reptilia. 

 Sauru'rse (Gr. sauros, a lizard ; otira, a tail). A division of the 

 class Aves, including the extinct bird Archseopteryx, which 

 possessed a tail longer than its body. 

 Scala me'dia (L. middle staircase). The name given to the 



canal in the lamina spiralis of the cochlea of the ear. 

 Scala tym'pani (L. staircase of the drum). The name given to 

 the canal in the cochlea of the ear which commences 

 opposite the fenestra rotunda of the tympanum. 

 Scala vestib'uli (L. staircase of the vestibule). The name given 

 to the canal in the cochlea of the ear which communicates 

 with the vestibule. 



Scala'riform (L. scalaria, stairs ; forma, shape). Ladder-like. 

 The name given to a form of vegetable tissue having 

 transverse markings like the steps of a ladder. 



