694 



ZOOLOG T. 



usually quiescent, chrysalis 



stage of insects. 



RATIT^E (Lat. ratis, a raft). A 

 division of birds with a keelless, 

 raft or punt-like sternum. 



RHIZOPODA (Gr. riza, root ; pous, 

 poilos, foot). The root-footed 

 Protozoa. 



ROTIFERA (Lat. rota, a wheel ; 

 fero, I bear). An order of crus- 

 tacea with a pair of ciliated vela 

 in motion, resembling wheels. 



SARCODE (Gr. sar.r, flesh ; odos, 

 way). Equivalent and earlier 

 term for protoplasm. 



SCABROUS. Rough like a file , 

 with small raised dots. 



SETACEOUS (Lat. seta, a bristle). 

 Bristle-like. 



SPIRACLE (Lat. spiro, to breathe). 

 The lateral breathing pores of 

 insects. 



STIGMATA (Gr. stigma, a mark). A 

 synonym of spiracle. 



STOLON (Lat. stolo, a shoot spring- 

 ing from the root of a plant). 

 Applied to the root-like creeping 

 growths of polyps aud other Cce- 

 lenterates. 



STREPSIPTERA (Gr.strephis,a twist; 

 pteron,w'mg). A group of beetles, 

 whose minute front wings appear 

 as if twisted. 



STROBILA (Gr. strobrtos, a fir cone). 

 The chain of zooids of a larval 

 medusa ; the chain of proglot- 

 tides of a tape-worm. 



SUTURE. A seam or impressed 

 line between the bones of the 

 skull or parts of the crust of an 

 Arthropod. 



SYMPHYSIS (Gr. sumphnxis, a grow- 

 ing together). The union of 

 two bones. 



T ELSON (Gr. telson, from telos. end). 

 The rudimentary terminal seg- 

 ment of the abdomen of Arthro- 

 pods. 



TENERAL. A state of the Neurop- 

 terous imago after exclusion 

 from the pupa, in which it has 

 not fully completed its coloring, 

 clothing, etc. 



TENTACULUM (Lat, tento, I touch). 

 A feeler or tentacle. 



TERGUM (Lat. back). The dorsal 

 region of Arthropods. 



TEST (Lat. testa, a shell). The 

 thickened integument of Tuni- 

 cata. 



TESTACEOUS. Dull red ; brick 

 color. 



THORAX (Gr. thorax, a breast- 

 plate). The chest in verte- 

 brates ; the middle body in in- 

 sects and some Crustacea. 



THYSANURA (Gr. thusanoi, fringes ; 

 ditrn, tail). The lowest order of 

 insects. 



TOMENTOSE. Covered with fine 

 matted hairs. 



TRABECUL^E (cranii), dim. of 

 trabs, a beam. Applied to the 

 longitudinal cartilaginous bars of 

 the fore-part of the head of ver- 

 tebrate embryos. 



TRACHEA (Gr. tracheia, the rough 

 windpipe). The respiratory 

 tube in vertebrates ; the air- 

 tube of Tracheate insects. 



TREMATODA (Gr. trema, a pore 

 or hole). An order of 

 worms. 



TRUNCATED. Cut squarely off ; 

 docked. 



TUBERCULOSE. Covered with tu- 

 bercles. 



TUNICATA (Lat. tunica, a cloak). 

 The class of worms called As- 

 cidians. 



