GLOSSARY. 501 



ScANSORES (Lat. seando, I climb). The order of the Climbing Birds (Parrots, 

 Woodpeckers, &c. ) 



Scapula (Lat. for shoulder-blade). The shoulder-blade of the pectoral arch 

 of Vertebrates ; in a restricted sense, the row of plates in the cup of 

 Crinoids, which give origin to the arms, and are usually called the ' ' axil- 

 lary radials." 



ScLERENCHYMA (Gr. sHcros, hard; and encMima, tissue). The calcareous 

 tissue of which a coral is composed. 



ScLEROBASic (Gr. skleros, hard ; hcwis, pedestal). The coral which is pro- 

 duced by the outer surface of the integument in certain Adinozoa (o.g., Red 

 Coral), and forms a solid axis which is invested by the soft parts of the 

 animal. It is called "foot-secretion" by Dana. 



Sclerodermic (Gr. skleros ; and derma, skin). Applied to the corallum which 

 is deposited within the tissues of certain Adinozoa, and is called "tissue- 

 secretion " by Dana. 



Sclerotic (Gr. skleros, hard). The outer dense fibrous coat of the eye. 



Scolecida (Gr. skolex, worm). A division of the Annuloida. 



Scuta (Lat. scutum, a shield). Applied to any shield-like plates ; especially 

 to those which are developed in the integiiment of many Reptiles. 



Selachia or Selachii (Gr. selachos, a cartilaginous fish, probably a shark). 

 The sub-order of Elasmolranchii, comprising the Sharks and Dog-fishes. 



Sepiostaire. The internal shell of the Sepia, commonly known as the 

 " cuttle-bone." 



Septa. Partitions. 



Serpentiform. Resembling a serpent in shape. 



Sertularida (Lat. sertum, a wreath). An order oi Hydrozoa. 



Sessile (Lat. sedo, I sit). Not supported upon a stalk or peduncle ; attached 

 by a base. 



Set^ (Lat. bristles). Bristles or long stiff hairs. 



Setiferous. Supporting bristles. 



Setigerous (= Setiferous). 



Setose. Bristly. 



SiGiLLARioiDS (Lat. sicjiUa, little images). A group of extinct plants of 

 which Sigillaria is the type, so called from the seal-like markings on the 

 bark. 



Siliceous (Lat. silex, flint). Composed of flint. 



Sinistral (Lat. sinistra, the left hand). Left-handed ; applied to the direc- 

 tion of the spiral in certain shells, which are said to be "reversed." 



Siphon (Gr. siphon, a tube). Applied to the respiratory tubes in the Mol- 

 lusca ; also to other tubes of difi"erent functions. 



SiPHONOPHORA (Gr. siphon; and phero, I carry). A division of the Rydrozoa 

 comprising the Oceanic forms (flalycophoridce and Physophoridce). 



Siphonostomata (Gr. siphon ; and stoma, mouth). The division of Gastero- 

 podous Molluscs, in which the aperture of the shell is not " entire," but 

 possesses a notch or tube for the emission of the respiratory siphon. 



SiPHUNCLE (Lat. siphunculus, a little tube). The tube which connects to- 

 gether the various chambers of the shell of certain Cephalopoda {e.g., the 

 Pearly Nautilus). 



SiPUNCULOiDEA (Lat. siphunculus, a little siphon). A class of Anarthropoda 

 (Anmilosa). 



