396 THE MEROTOMY OF 



6. — The above observation proves that the nucleus can lose the 

 property of regeneration, whilst it retains that of secretion, etc. 



7. — The author, at times, observed a remarkable anomaly in 

 the process of multiplication by division, the products of division, 

 instead of becoming free in each generation, remain united, and 

 form an irregular colony by the coalescence of component individu- 

 als. Their nuclei, during the process of multiplication, remain 

 united in a knotted mass in the centre of the colony. 



8. — The author observes a deformity caused by a prolongation 

 at the margin of the wound, caused by the different layers of plasm, 

 and furnished with cilia, which he considers to be the result of a 

 feeble regenerating power in Paramoecium. 



9. — In Paraincecium bursarm, and in the allied Colpidiwn^ 

 regeneration appears to be slow and incomplete, but resistance to 

 regeneration is less than in P. Auralia. 



C. — References to general cytology or cell-morphology. Phys- 

 iologically considered experiments in merotomy with respect to the 

 Protozoa are of the greatest importance, in connection with the 

 experiments of Schmitz, Klebs, Korschelt, and Haberlandt, on 

 the vegetal and animal cells. 



The first conclusion arrived at through these experiments is 

 that the functions of cells, in reference to the movements of 

 protoplasm (amoeboid and ciliary movements, pulsations of the 

 contractile vesicle, etc.) can be accomplished without intervention 

 of the nucleus ; while the manifestations of the secretory activity 

 of protoplasm (intercellular digestion, secretion of cellular enve- 

 lopes, etc., cuticle, cellulose, calcareous^ and mucous layers, etc. 

 etc.) depend upon the nucleus. 



In vegetal as well as in animal cells, the nucleus rules the 

 cellulary secretions, according to the observations of Schmitz and 

 Klebs on the A/gis, Hofer and Verworn on the Rhizopoda^ and the 

 author on the Ciliata. Hofer demonstrated the influence of the 

 nucleus on the secretions of the digestive juice among the Amoeba^ 

 as did the author in Para77icecium. As, by a law of the division 

 of labour, the higher functions of sense and motion belong to 

 the protoplasm, so the functions of nutrition belong to the 

 nucleus. 



The function of reproduction appears, according to Prof. 



