GLOSSARY. 681 



VASIFOR3I. (Lat, vas, a vessel.) Shaped like a bloodvessel or tube. 



Ventral. Relating to the inferior surface of the body. 



Ventricular. (Lat. ventriculus, a ventricle or small cavity, like those of the 



heart or brain.) Belonging to a ventricle. 

 Vermes. (Lat. vermis, a worm.) Worm-like animals : applied in a very extensive 



sense by Linnteus. 

 Vertebrata. (Lat. vertebra, a bone of the back ; from vertere, to turn.) The 



highest division of the Animal Kingdom, characterised by having a back-bone. 

 Verticillate. (Lat. verticillus, a whirl.) An'anged like the rays of a wheel or 



spindle. 

 Vermiform. Worm-shaped. 



Vesicul^. (Lat. vesica, a bladder.) Receptacles like little bladders. 

 Villi. Small processes like the pile of velvet. 

 Vitelline. (Lat. vitellus, yolk.) Of or belonging to the yolk. 

 Viviparous. (Lat. vivus, alive; pario, I bring forth.) The animals which bring 



forth their young alive. 



Whorl. The spiral turn of a shell, and the like arrangement of a group of leaves 



or polypes upon a stem. 

 Whorling. The act of disposing parts in a series of spiral cm-ves round an axis. 



XiPHOSURA. (Gr. xiphns, a sword; oura, a tail.) A family of Crustacea with 

 sword-shaped tails, as the Limulus. 



Zoophyte. (Gr. zoon, animal; phi/ton, plant.) The lowest primary division of 

 the Animal Kingdom, which includes many animals that are fixed to the ground 

 and have the form of plants. 



Zoospore. (Gr. zoon, animal; spora, seed.) The reproductive bodies of sexless 

 water-plants, wliich enjoy the power of locomotion for a certain time. 



