270 



The Unltij of the Organism 



of the sixtccn-niillimctcr-long Foronyora gigantea described 

 by E. van Bcnedcn and discussed and figured by Biitschli 

 shows us an ontogeny or individual development in one case 

 no less positive, and probably little less complex were all 



r Tit. 



d.TTl. 



FIGURE 10. CORYCET.r.A AlOIATA (fKO.AI WASIEI.E WSKI, AFTER LEGER). 



ep'in., epimerite. pr'ni., protoiiierite. d.in., deutonierite. n., nucleus. 



the details known, than that of many endoparasltic worms.* 



But how could a zoologist hesitate to recognize that so 



elaborate an organism, as for example a Corycella, figure 



* With reference to the development of this species, it should be 

 remarked that althougli later researches have proved that the amoeboid 

 stages considered by van Beneden to belong to this series in reality have 

 nothing to do with this animal, yet the later stages leading up to the 

 final one, or "trophozoite" seem not to have been questioned; and these 

 constitute the evidence of an ontoyeny with which we are now specially 

 concerned. 



