INDEX. 



Acineta, 407. 



Acontia, 356. 



Air-tubes of Fly, 95. 



Alcyonium, 3-49. 



Alternation of Generations, 324, 



Bug", mouth of, 143. 

 Bugula, 64. 



Butterfly, scales of, 79, 80. 

 sucker of, 153. 



