Sai´tis pu´lex.
Saur-u´ræ [Gr. sauros, lizard; oura, tail.] Jurassic birds having lizard-like tails with distichous feathers, as Archæopterygidæ.
Sca-phop´o-da [Gr. skaphos, bowl, skiff; pous, foot.] A division of molluscs.
Sep´al [Lat. separ, separate.] One of the individual leaves of a calyx.
Si-lu´ri-an [Silures, ancient Celts in Wales.]
Sim´i-a [Lat. simia, ape.] A genus typical of Simiidæ and now restricted to the orang.
Si-mi´i-dæ [Lat. simia, ape.] A family of Old World Anthropoidea.
Sim-i-i´næ [Lat. simia, ape.] A subfamily of Simiidæ with robust form and molars tuberculated as in man and no ischial tuberosities, including Chimpanzees, Gorillas, and Orangs.
Si´nus veno´sus [Lat.] Venous cavity. (1) In higher vertebrates the main part of the auricular cavity. (2) In the lower vertebrates, a dilitation at the termination of venous channels, forming a separate chamber.
Si-re´ni-a [Lat. siren, siren.]