S26 



GLOSSARY. 



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

 fringes; oura, tail). The low- 

 est order of insects. 



To men-tose'. Covered with fine 

 matted hairs. 



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

 trabs, a beam. Applied to the 

 longitudinal cartilaginous bars 

 of the fore-part of the head of 

 vertebrate embryos. 



Tra'che-a (Gr. traclieia, the 

 rough windpipe). The respira- 

 tory tube in vertebrates; the 

 air-tube of tracheate insects. 



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

 or hole). An order of worms. 



Trun ca'ted. Cut squarely off; 

 docked. 



Tu-ber'cu-lose. Covered with 

 tubercles. 



TuN-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 Lamellibranchi- 

 ate shell. 



Un-gu-la'ta (LaX.ungida, a hoof). 

 The order of hoofed mammals. 



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

 visible). The tailed Batrachi- 

 ans. 



U-ro-mere' (Gr. ouros,tai\ ; meros, 

 a part). Any of the abdominal 

 segments of au 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 uromeres or 

 abdominal segments of insects. 



Vacuole' (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. 



Ventral. Applied to the under 

 side of the abdomen, or of the 

 body of invertebrates. 



Ven'tri cle (Lat. ventriculus, di- 

 minutive of venter). One of the 

 cavities of the heart or brain- 



Ver ric'u-late. With thick set 

 tufts of parallel hairs. 



Ver'ru-cose. Covered with wart- 

 like prominences. 



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

 One of the bones of the spinal 

 column or backbone. 



Ver-ti-cil'late. Placed in 

 whirls. 



Vesicle (Lat. vesica, a blad- 

 der). A little sac, bladder, or 

 cyst. 



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

 ternal organs of the body. 



Vi-vip'a-rous (Lat. vie us, alive; 

 and pario, I bring forth). Ap- 

 plied to animals which bring 

 forth their young alive. 



Zoom (Gr. zoon, animal; eidos, 

 form). The highly specialized 

 organs of such animals as the 

 Hydroids, and other compound 

 forms which have a marked in- 

 dividuality, and which might 

 be mistaken for genuine indi- 

 viduals. 



Zo-o'phyte (Gr. zoon, animal; 

 phuton, plant). Applied to the 

 plant-like polyps, sertularians, 

 and sponges. 



