GEMMATION AND GENERATION. 329 



port his view when they are coupled with Von Siebold's 

 discoveries. The Hydra sending forth a second Hydra 

 from its own substance directly, may be said to " bud " 

 like a plant. The Aphis producing broods of Aphides 

 internally, instead of externally, which broods are un- 

 attached to their parent, may likewise be said to exhibit 

 " internal Gemmation," — although this budding is the 

 result of ova. Von Siebold's virgin moths present us 

 with eggs instead of young — eggs in every way iden- 

 tical with those produced by Generation : yet, if this be 

 so, how shall we name the process ? We must name 

 it internal oviparous Gemmation ; and what distinc- 

 tion there is between oviparous Gemmation and ovi- 

 parous Generation, it will be difficult to say. In both 

 cases, eggs are produced directly from the substance 

 of the parent ; these eggs, in both cases, develop into 

 animals indistinguishable in structure or function, and 

 capable of reproducing their species by either mode. 

 From attending to formal and accessory differences, 

 and not keeping the attention fixed on essential pro- 

 cesses, physiologists have imagined a distinction to exist 

 between Gemmation and Generation, which will not 

 withstand scrutiny. Thus M. Quatrefages says : " In 

 the animal, as in the plant, reproduction by budding is 

 efi"ected on the spot {en entier sur ]jlace), at the ex- 

 pense of the parent's substance. In the two kingdoms, 

 reproduction by seeds and eggs demands the concourse 

 of two elements prepared by special organs. It is im- 

 material whether these organs are both united in the 

 same individual, or borne by distinct individuals ; there 



