INDEX 



381 



Trout, 155 

 Trypanosome, 33 

 Trypsin, 188 

 Tube feet, 75, 77 

 Tuberculosis, 137 

 Tunicata {see Urochordata) 

 Turtle, 158; exoskeleton, 172 

 Tympanic membrane, 165, 217 

 Tympanum, 123 

 Typhlosole, 86 



U 



Ulna, 180, 181 



Umbilical artery, 238 



Umbilical cord, 238 



Umbilical veins, 238 



Umbo, 140 



Unguiculata, 160 



Ungulata, 160, 162 



Unio, 139 



Uniramous appendage, 100 



Univalves, 140 



Urea, 199, 204 ; formation, 189 



Ureter, 184, 202-204 



Urethra, 202 



Urine, 204 



Uriniferous tubules, 202 



Urochordata, 141, 150 



Urodela {see Caudata) 



Urogenital canals, 184, 204 



Urogenital system, Frog, 183; lab- 

 oratory, 339 



Uropod, 102 



Urostyle, 178 



Uterus, Frog, 184, 206; Mammal, 

 236 



Utriculus, 217, 218 



Vacuole, cell, 5 



Vagina, Bee, 131 



Valve, Clam shell, 139 



Valves, heart, 194 



Vasa efferentia, 204 



Vascular system, Bee, 129; Clam, 



143; Crayfish, 105; Earthworm, 



87; Frog, 192; functional, 198; 



Grasshopper, 119; Starfish, 78; 



laboratory, 333 335 

 Vas deferens, Bee, 130; Crayfish, 



108; Grasshopper, 121 



Vegetal pole, 222 



Vein, hepatic portal, 195 



Veins, Frog, 194, 195 ; umbilical, 238 

 {see Vascular system) 



Velum, Bee, 126 ; Obelia, medusa, 69 



Vena cava, Clam, 144 ; Frog, 193, 194 



Ventricles, Bee, 130 ; brain, Frog, 210 ; 

 Clam, 143, 144; Frog, 193, 196, 197 



Ventriculus, 118, 128 



Venus, 139 



Vertebra, Frog, 178 



Vertebral column, Frog, 152, 178; 

 Mammal, 179 



Vertebral plate, Frog embryo, 227 



Vertebrates, 152-164; coelom, 182; 

 limbs, comparison of, 181 ; develop- 

 ment, 222-238; exoskeleton, 172; 

 skeleton, 175 ; teeth, 178 {see Frog, 

 Mammals) 



Vessel, afferent branchial, Crayfish, 

 108 



Vessel, lateral-neural, 88 ; sub-neural, 

 88 



Vessels, Dorso-intestinals, 89; seg- 

 mental, 89 ; Ventro-intestinal, 89 ; 

 Ventro-parietal, 89 {see Vascular 

 system) 



Vestibule, Vorticella, 48 



Viscera, Frog, 182-184; laboratory, 

 325-327 



Visceral ganglion, 148 



Visceral mass, Clam, 142 



Vitamines, 9 



Vitelline membrane, 122, 205 



Vitreous chamber, eye, 220 



Vitreous humor, 220 



Viviparous Mammals, 160, 236 



Vocal cords, 190 



Vocal sacs, 185 



Volvox, 52 ; description, 34-38 ; lab- 

 oratory, 261 ; fife processes, 36-38 ; 

 structure, 34 ; zygote, 37 



Vomers, 176 



Vorticella, 41; description, 48-51; 

 laboratory, 265; life processes, 

 50, 51 ; structure, 48 



W 



Water tubes, 145 



Water vascular system, 75, 76 



Wax 135 



Wax' glands, 127, 135 



W 7 eb, interdigital, 166 



