GLOSSARY. 



49 



joint which unites the bones of the 

 skull. The line of separation of any 

 two parts of a crust which are connect- 

 ed only by membrane or ligament, but 

 do not inosculate. Spurious Suture, 

 an impressed line in any part of a 

 body, which resembles a suture, but 

 does not really divide the crust. 



Symphysis. In anatomy, the union of 

 bones by cartilage : in surgery, a coa- 

 lescence of a natural passage. 



Synarthrosis. Union of bones without 

 motion, as in sutures. 



Synchondrosis. The connection of bones 

 by means of cartilage, 



Syndactylous. Having the front toes 

 united, the terminal joint only being 

 free. 



Synonyme. A word or name which has 

 the same signification as another. Sy- 

 nonymous Terms are names applied to 

 the same groups or species of animals 

 by different authors. 



Synovia!. Pertaining to synovia, a fluid 

 secreted into the cavities of the joints, 

 for the purpose of lubricating them. 



Systematic. Formed with regular con- 

 nection and adaptation or subordina- 

 tion of parts to each other, and to the 

 design of the whole ; as a proceeding 

 according to some methodical plan or 

 system. 



T. 



TcEnoid. Kibbon-shaped, like the Taenia, 

 or tapeworm. 



Tardigrada. The name given to a 

 family of anomalous Mammalia (the 

 Sloths), differing widely from all other 

 quadrupeds in their habits, economy, 

 and osteological structure. 



Tarsus. The terminal portion of the leg 

 in insects ; affording important charac- 

 ters for generical and family distinc- 

 tions. It is a jointed piece, armed at 

 its extremity with one or two slender, 

 curved hooks (ungues), and often ac- 

 companied by membranous or fleshy 

 cushions (pulvilli). The number of 

 joints varies from two to five. 



Tawny. A pale, dirty orange color. 



Tectibranchiate. Belonging to the order 

 of Mollusca in which the gills are 

 covered by the mantle. 



7 



Tegument. The skin or other natural 

 covering of an animal body; a sub- 

 stance serving to defend any otherwise 

 exposed part. 



Tegumentary. Having the properties of, 

 or belonging to, a tegument ; consist- 

 ing of teguments. 



Telum. The thirteenth or last segment 

 of insects. 



Temporal. Pertaining to the temples; 

 as the temporal arteries, &c. 



Tentacula. The feelers of snails, &c. 



Terebella. The instrument or organ with 

 which many female insects bore holes 

 to deposit their eggs. 



Terminal. Forming the extremity. 



Terminology. That branch of the science 

 of Natural History which explains all 

 the terms used in the description of 

 natural objects. 



Tertials. Those feathers in the wings of 

 birds which take their rise from the 

 second bone, at the elbow-joint, forming 

 a continuation of the secondaries, and 

 seem to do the same with the scapu- 

 lars, which lie over them. 



Tertiary (in geology). Of the third for- 

 mation. The teriiary formation consists 

 of a series of horizontal strata, more 

 recent than chalk-beds, consisting 

 chiefly of sand and clay, and frequently 

 embracing vast quantities of organic 

 remains of the larger animals. 



Tessellated. Checkered like a chess- 

 board. 



Testacea. The third order of worms, in- 

 eluding those which are covered with 

 a testaceous shell. 



Testaceous. Composed of the materials 

 which constitute shells, viz. carbonate 

 of lime and animal matter. Pertain- 

 ing to the Testacea. Also applied to 

 the color resembling a tile, a dull-red. 



Testudinal; Testudinous. Pertaining to 

 the tortoise, or resembling it. 



Testudinarious. Painted with red, black, 

 and yellow, like tortoise-shell. 



Testudineous. Resembling tortoise-shell. 

 Tetrabranchiate. Belonging to the order 



of Cephalopods with four gills. 

 Tetradactylous. Having four toes. 

 Tetragonal. Whose horizontal section is 



quadrangular. 

 Tetrahedral. Having four sides. 



