No. 554] SHORTER ARTICLES AND DISCUSSION 125 



genetic, which is reserved until the time of puberty for the formation of 

 the reproductive material. This reservation of the phylogenetic material 

 I designated as the Continuity of the Germ-protoplasm. 7 



This clear expression of the doctrine of germinal continuity 

 apparently does not appear in Jager's later work, 8 to which 

 reference is usually made. 



Weismann in his essay on the "Continuity of the Germ- 

 plasm," 9 assumed that he was the first to give expression to this 

 conception but in a later work 10 made acknowledgments to other 

 authors who had anticipated his theory. With respect to Jager, 

 however, he said: 11 



The praiseworthy attempt to do justice to my predecessors in this 

 particular subject lias perhaps been earned too far. In Geddes and 

 Thompson's "Evolution of Sex" (p. 93), for instance, a quotation is 



regard to the theory under consideration. The quotation in which this 



chstoftV ei 



hindurch das Keim Protoplasma^ines^Thi 

 spezifische Beschaffenheit alien Anfecl 



•Jager, G., "Lehrbueh der allgemeinen Zoologie," Leipzig, 

 Abtheilung. 



•"Der Continuitat des Keimplasmas, " Jena, 1885; Essay IV i 

 ^ed translation, 2d ed., 1891, p. 163. 



""The Germ-Plasm. A Theory of Heredity," New York, 1 



