OLOSSABT. 



Tht-san-u'ra (Gr. thusanoi, 

 fringes; oura, tail). The low- 

 est order of insects. 



To mbntose'. Covered witlr fine 

 mfitted luiirs. 



Tba-bec'u-l.e (cranii), dim. of 

 trabs, a beam. Applied to tlie 

 longitudinal cartilaginous bars 

 of the fore-part of the liead of 

 vertebrate embryos. 



Tra'che-a (Gr. traclieia, tlie 

 rough windpipe). The respira- 

 tory tube in vertebrates; the 

 air-tube of tracheate insects. 



Trem-a-to'da (Gr. trema, a pore 

 or liole). An order of worms. 



Trun ca'ted. Cut squarely off ; 

 docked. 



Tu-bek'cu-losb. Covered with 

 tubercles. 



TcJN-i-CA'TA(Lat. tunica, a cloak). 

 The class of chordata called 

 Ascidians. 



Um'bo (Lat. the boss of a shield). 

 The beak of a Lamellibranclii- 

 ate shell. 



TJn-gu-la'ta (haX.ungula, a hoof). 

 The order of hoofed mammals. 



U-ko-de'la (Gr. oura, tail ; delos, 

 visible). The tailed Batrachi- 

 ans. 



U-ko-mbre' (Gr. ourfts.tail ; meros, 

 apart). Any of tlie abdominal 

 segments of an Arthropod. 



U-ROP'O-DA (Gr. ouros; pons, po- 

 dos, foot). Any of the abdom- 

 inal feet of Arthropoda. 



U-ro-some' (Gr. ouros, tail ; meros, 

 a part). The abdomen of Ar- 

 thropods. 



U-ro stern'ite. The sternal or 

 under piece of the nromercs or 

 abdominal segments of insects 



Vac-u-ole' (Lat. vacuus, empty). 

 The little cavities in the bodies 

 of Protozoa. 



Vein. Applied to the ribs or 

 " nervures" of the wings of in- 

 sects ; the branches of the veins 

 are called venules. 



Vbn'tral. Applied to the under 

 side of the abdomen, or of the 

 body of invertebrates. 



Vbn'tri CLE (Lat. -eentriculus, A\- 

 minutiveof WHter). One of the 

 cavities of the heart or hrain- 



Ver Rio'u-LATB. With thick set 

 tufts of parallel hairs. 



Ver'ru-cose. Covered with wart- 

 like prominences. 



Ver'te-bra (Lat. rerto, I turn). 

 One of the bones of the spinal 

 column or backbone. 



Ver-ti-cil'late. Placed iu 

 whirls. 



Vbs'i-cle (Lat. vesica, a blad- 

 der). A little sac, bladder, or 

 cyst. 



Vis'cb-ra (Lat. viscus). The in- 

 ternal organs of the body. 



Vi-vip'A-Rons (Lat. vivus, alive; 

 and pario, I bring forth). Ap- 

 plied to animals which bring 

 forth their young alive. 



Zo'oiD (Gr. soon, animal ; eidos, 

 form). The highly specialized 

 organs of such animals as the 

 Hydroids, and other compound 

 forms which have a marked in- 

 dividuality, and wliich might 

 be mistaken for genuine indi- 

 viduals. 



Zo-o'riiYTE (Gr. zooii, animal; 

 pluiton, plant). Applied to the 

 plant-like polyps, sertularians, 

 aud sponges. 



