KEIMBAHN-DETERMINANTS 213 
A. lumbricoides 
A. rubicunda Chromatin O. Meyer 1895 
A. labiata 
Cyclops Aussenkérnchen | Haecker 1897 
Ektosomen Haecker 1903 
Calliphora Dotterplatte Noack 1901 
Dytiscus Anello cromatico | Giardina 1901 
Apis mellifica Richtungskorper | Petrunkewitsch | 1902 
Parasitic Nucleol Silvestri 1906 
Hymenoptera peace ea 1908 
Chrysomelidee Pole-disc Hegner 1908 
Miastor metraloas | polares Plasma | Kahle 1908 
Sagitta besondere Elpatiewsky 1909 
Korper 
Guinea-pig Chondriosomes_ | Rubaschkin 1910 
Chick Chondriosomes | Tschaschkin 1910 
Lophius extruded Dodds 1910 
plasmosome ; 
Ascaris Plasmadifferen- | Boveri 1910 
zen 
Chironomus Keimbahn- Hasper 1911 
plasma 
Copepoda Ectosomen Amma 1911 
Polyphemus Nahrzellenkern | Kiihn Hoe 
Sagitta Keimbahn- Buchner 1910 
chromidien 
Man Sertoli cell Montgomery 1911 
determinant 
Chick Attraction- Swift 1914 
sphere 
Parasitic Keimbahn- Hegner 1914 
Hymenoptera chromatin 
a. Nucuear. Nucueour. It seems certain that 
bodies of a nucleolar nature behave as keimbahn- 
determinants. 
There are three or more kinds of 
bodies that are spoken of as nucleoli. Of these may 
be mentioned (1) the true nucleoli or plasmosomes, (2) 
karyosomes or chromatin-nucleoli, and (3) double-nu- 
