GLOSSARY 



Tarsi, the segmented feet of insects and other arthropods. 

 Tentacle, a slender, unsegmented, feeler-Hke process. 

 Testis, the organ in which the male or sperm cells develop, 



especially in higher animals. 

 Thorax, the division of the body posterior to the head; in 



mammals, the division of the body containing the heart 



and lungs. 



Umbo, the thickening above the hinge on the shell of a clam. 

 Utricles, the little sacks or bladders, as in the bladderwort, 

 Utricidaria. 



Ventral, the under side or front; opposite to the back. 



Vivarium, a place for keeping live animals, as aquarium or 

 terrarium. 



Whorl, a circular arrangement of leaves around a stem. 



Zooecium, the outer shell-like tube of some bryozoans. 



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