GLOSSARY. 141 



Syno'via (Gr. sun, together; don, an egg). The fluid secreted 

 for the lubrication of the joints by the synovial mem- 

 branes, so called because resembling the white of an egg. 



Syno'vial (Gr. sun, together; don, an egg). Applied to the 

 bursce or membranous sacs secreting the synovia, and 

 which line the movable joints ; also to the synovia itself, 

 under the name of the synovial fluid. . 



Sy'rinx (Gr. surinx, a pipe, flute). The lower larynx in birds 

 by which the voice is produced. 



System'ic. Relating to the system as a whole. Applied to 

 that portion of the circulation by which the blood is con- 

 veyed from the left ventricle of the heart, over the system 

 and back to the right auricle. A " systemic " heart in the 

 Invertebrata is one which propels blood over the system 

 after receiving it from the gills. 



Sys'tole (Gr. sustello, to draw together, contract). A contrac- 

 tion. Applied to the contraction of the heart 



T. 



Tac'tile (L. tactus, touching). Relating to touch, as the 

 tactile corpuscles, which are concerned in the sense of touch. 

 Tactile nervous impressions are those which, when con- 

 veyed to the brain, result in the perception of touch. 



Tae'nia hippocam'pi (Gr. tainia, a band or ribbon; hippos, a 

 horse; kampto, I bend). A narrow white band which 

 runs along the hippocampus major of the lateral ventricles 

 of the brain. 



Tae'nia semicircula'ris (Gr. tainia, a band or ribbon). A 

 narrow flat band between the corpus striatum and optic, 

 thalami of the brain. . 



Tae'niada (Gr. tainia, a ribbon). The tape- worms. 



Ta'lo-scaph'oid (L. talus, the astragalus; scaphoid bone}. The 

 name given to a ligament on the dorsum of the foot, which 

 extends from the astragalus to the scaphoid bone. 



Tal'pinae (L. talpa, a mole). The moles, a family of the 

 Insectivora. 



Talus (L. a die). Another name for the astragalus - which 

 see. 



