so 



has "been shown in iiic.ny cc ses to "be applicable to otJier 

 plants, e.g., in the forms.tion of the mecjaspores of the Hv- 

 dropteridineae (STRASBIIRGRR, »02), in the forms of juvenile 

 leaves (BERRY, *06), in the post -embryonal otaces of t}ie 

 Laminariaceae (SETCHELL, *05), in the formation o£ t}ie eggs 

 of the Pucaceae (for the facts, see OLTIJIAITIIS , »05, pp. 47- 

 3) . If this theory is c-t all applicable to Griff it hsia, 

 .e should expect some evidence of it at the times in the 

 life history \;hen the plant returns to the unicellular con- 

 dition. If there is virtue in the conclusions drawn from 

 coiviparative morphology, the ancestors, and even tlie compar- 

 atively recent ancestors^ of Graf f i thsia , possessed iminu- 

 cleate cells. The coenocytic iiabit ^.as acquired late in 

 the history of the race, and v/e -Should exjject it, there- 

 fore, to appes,r late in the history of the individual, so 

 that the cells of the early stages v/ould be uninucleate; 

 yet in the germinating spore of Griff ithsia the first vis- 

 ible change is the attainment of v/hat we luuct regard as 

 the recently acquired coenocytic habit. In this respect, 

 then. Griff ithsia does not conform to the recapitulation 

 theory. 



phylogenetic development." Strasbitrger, IToll, Sclienck, 

 and Schimper: A Text -book of Boto.ny, 2nd English edition, 

 1903, p. 49. 



