INDEX. 



871 



Tergum, 96, 143 

 Terminal plates, 189 

 Terminology, scientific, 14 

 Testis, 129 



structure of, 133 

 Thoracic appendages, 164 



development of, 217 



somites, 150 

 Thorax, 19, 141 

 Tissue, 175 

 Touch, organ of, 113 

 Transformism, 318 

 Trevieanus, referred to, 4 

 Tribe, 252 



Trichobranchite, 263 

 Troglocaris, 337 



V. 



Valves of heart, 73 

 of stomach, 59 

 Van Helmont, quoted, 45 

 Variety, 290, 292 

 Vas deferens, 130 

 Vent, see Anus 

 Vcrtcbrata, 284 



Vertebrata, eye of, 122, 125 

 Visual pyramid, 121 



rod, 12f 

 Vitelline membrane, 133 

 Vitellus, 133 

 Voluntary action, 112 

 Von der Marck, 317 



Ward, J., referred to, 354 

 Wassiliew, quoted, 353 

 Whirlpool of life, 84 

 Will, quoted, 353 

 Wood-Mason, quoted, 44 



Y. 



Yelk, 133 

 Yelk-division, 205 

 Young of Astacns, newly hatched, 

 characters of, 219 



Z. 



Zoaea stage of development, 280 



THE EXD. 



