INDEX 



149 



Tail fan, lobster 108 



Tapeworms: in key 132; in text 94 



Taxonomy, definition of 127 



Teeth: frog 4; lobster 114 



Telophase 63 



Telson 107 



Temperature, effect of, on activity 15 



Tendon 56; of Achilles 56 



Tentacles: Hydra 82, 83, 84; Nereis 



95; snail 136 

 Tergum 107, 117 

 Testes: earthworm 101; frog n, 40; 



function of 20; grasshopper 122; 



Hydra 86; lobster 114 

 Thalamencephalon 47 

 Thigh, 3; bones of 55; muscles of 



59, 6p 

 Thoracic appendages: grasshopper 



ng; lobster 108, 109 

 Thorax: grasshopper 117, 118, 119; 



lobster 107, no, in 

 Thyroid gland 12 

 Tissue, definition of 26 

 Tissues: connective 29-30; epithelial 



27, 28; frog 26-33; muscular 28; 



nervous 31 



Tongue 4; muscles of 58, 59 

 Tract, definition of 8 

 Tracts of frog 8 

 Tracheae. See Tracheal tubes 

 Tracheal tubes: fly larvae 21, 33; 



grasshopper 119, 121 



Transverse processes 6, 51 

 Trematodes: in key 132; in text 93 

 Trichocysts 75, 77 

 Triploblastic 71, 92 

 Trochelminthes: in key 130; in 



text 80 



Truncus arteriosus 44, 46 

 Trunk, muscles of 57 

 Turbellaria: in key 132; in text 93 

 Tympanic membrane 2; ring 57 

 Typhlosole 100, 103 



Undulating membrane 76 



Uniramous appendage 108 



Unit character 70 



Ureter n, 40 



Urinary bladder, frog 8, 9, 40, 41, 10; 



ligaments of 8, 10 

 Urinogenital system, frog: definition 



ofii; general to, n; special 40, 41 

 Uropods 108 

 Urostyle 6, 51 

 Uterus 41 



Vacuoles: contractile 72, 73, 76; 

 food 73, 76, 77 



Variety, definition of 127 



Vasa efferentia 40 



Vas deferens: earthworm 101; grass- 

 hopper 122; lobster 114 



Vegetative hemisphere 66 



Vein, definition of 9, 20 



Veins: of frog 5, 6, 42-43, abdominal 

 6, 43, 8, hepatic portal 43, 

 musculo-cutaneous 5, 42, pul- 

 monary 43, postcaval 42, precaval 

 42, renal portal 43, systemic 43; 

 of wings 119 



Venous system, frog 42-43 



Ventricle of heart 9, 45, 46 



Ventricles of brain 46, 47, 48 



Vertebra, structure of 51 



Vertebral column 6, 51, 52 



Vertebrata in key 131, 133, 134 



Vertebrates, definition of 73 



Vertex 117 



Viscera, definition of 5 



Visceral skeleton 52, 53, 54 



Vocal cords 41; sac 5 



Vomerine teeth 4 



Vorticella 79 



Water bears 81; fleas 81; mites 8 1 

 Whitefish eggs, mitosis in 64 

 White matter of cord 31, 38 

 Wings 119 

 Wolffian duct, n 



Yolk 66 



Yolk plug 66, 67 



Zooids 87-89 

 Zygapophyses 53 



