INDEX. 



371 



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 

 Transfonnism, 318 

 TBEVTRANUS, referred to, 4 

 Tribe, 252 



Trichobranchiae, 263 

 Troglocai-i*, 337 



V. 



Valves of heart, 73 

 of stomach, 59 

 VAN HELMONT, quoted, 45 

 Variety, 290, 292 

 Vas deferens, 130 

 Vent, see Anus 

 284 



Vertebrate, eye of, 122, 125 

 Visual pyramid, 121 



rod, 121 



Vitelline membrane, 133 

 ViteUus, 133 

 Voluntary action, 112 

 VON DEE MAECK, 317 



W. 



WAED, 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 Agtacw, newly hatched, 

 characters of, 219 



Zoaea stage of development, 380 



C12) 



THE BND, 



