( i»3 ) 



TABLE II. 



Review of the Constituent Parts of the One-celled Gerni..organism, before 

 and after fertilization. 



Cf . the works of Eduard Strasburger (" Ueber Zellbildung, Zelltheilung 

 *nd Befruchtung," 2nd Edition ; Jena, 1876) ; of Oscar Hertwig (" Beitrage 

 sur Kentniss der Bildung, Befruchtung, und Theilung des Thierischen Eies;" 

 1875) ; of Leopold Auerbach (" Organologische Studien ; " 1874) ; and of Otto 

 Biitschli (" Studien iiber die ersten Entwickelungs-Vorgange der Eizelle," 

 etc.; 1876)." 



I. The Fertilizing Male, 

 or Paternal Sexual 

 Cell. 



The Sperm-cell. 



Syn. Thread - cell. 

 Seed-animalcule. Sper- 

 matozoa. Zoosperm. 

 Fig. 17, p. 173. 



Constituent Parts. 

 I. A. Protoplasm of the 

 Sperm-cell. 



(Spermoplasma.) 

 The central portion 

 and the tail of the seed- 

 thread, together with 

 the outer sheath of the 

 " head." 



I. B. Kernel (nucleus) 

 of the Sperm-cell. 



(Spermococcus.) 

 Sperm-kernel (Hert- 

 wig). " Head of the 

 sperm-animal" (with 

 the exception of the 

 thin outer sheath), 



II. The Fertilized Female, 

 or Maternal Sexual 

 Cell. 



The Egg-cell. 



Ovule, 

 in. The unfertilized 



egg- 



Fig. 1, p. 122. 

 Fig. 10, p. 134. 



Constituent Parts. 

 II. A. Protoplasm of the 

 Egg-cell. 



(Ovoplasm,a.) 

 Yelk, egg-yelk, Lecy- 

 thus, vitellus. 



II. B. Kernel (nucleus) 



of the Egg-cell. 

 (Ovococcus.) 



Germ -vesicle, or Pur- 

 kinje's vesicle (Vesicula 

 Germinativa) , contain- 

 ing the germ-spot 

 (Macula Germinativa), 

 or the nucleolus, which, 

 according to Hertwig, 

 becomes the egg-kernel. 



III. The New Cell, the 

 product of the Concre- 

 scence of I. and II. 



The Parent-cell. 



Cytula. 

 Syn. The fertilized 

 egg. The first cleavage- 

 globule. The oldest 

 cleavage-cell. Seamen- 

 tella prima. 



Fig. 21, p. 181. 



Constituent Parts. 

 III. A. Protoplasm of 

 Parent-cell: Cleavage- 

 yelk. 



(Cytuloplasma.) 

 Protoplasm of the 

 first cleavage - globule 

 (the product of the 

 amalgamation of I. A. 

 and II. A. 



III. B. Kernel (nucleus) 

 of the Parent-cell. 



(Oytulococcus.) 

 Cleavage-kernel (Hert- 

 wig). Germ - kernel 

 (Strasburger). Kernel 

 of the first cleavage - 

 globule (product of the 

 amalgamation of the 

 sperm -kernel and the 

 egg-kernel ?). 8i 



