400 MONTGOMERY. [Vol. XV. 



at this place. Certain of the following terms, however, apply 

 not to the true nucleoli but to the Caryosomata. 



German writers. — Nucleolus (Valentin) Keimfleck, Keimkern, 

 macula germinativa (Wagner) ; Kernkorper (chen) (Schwann, Val- 

 entin); Keimk6rper(chen); Wagner'scher Fleck; Binnenkorper 

 (Rhumbler) ; Hauptnucleolus, Nebennucleolus (Flemming) ; 

 Metanucleolus (Hacker) ; Plasmosoma (Ogata) ; Formations- 

 nucleolus (Marshall) ; Kernfleck, Nucleolide, Morulit (Frenzel) ; 

 Nucleolo-Centrosoma (Keuten) ; Mittelkorperchen, Eunucleolus 

 (Rosen) ; Nucleolkorperchen (Lonnberg) ; Stammnucleolus, 

 Nebenkiigelchen (Auerbach); Hauptkeimfleck, Nebenkeimfleck 

 (Leydig) ; Chromatin-Nucleolus, Paranucleolus (R. Hertwig). 



English and American writers. — Wagnerian vesicle, ento- 

 blast (Agassiz) ; pronucleolus (Mark) ; nucleole, germinal spot, 

 germinal dot, principal nucleolus, accessory nucleolus, proto- 

 macrosome (Greenwood). 



French writers. — Nucleole, tache germinative ; pseudonucldole 

 (Van Beneden) ; tache de Wagner, nuclide plasmatique, n. 

 mixte, n. nucleinien, nucleole-noyau (Carnoy) ; nucleole adventif 

 (Roule) ; corps nucleolaire, nucleolite (A. Schneider) ; nucleole 

 primitif et secondaire (Carnoy and Lebrun) ; corpuscule ger- 

 minatif (Van Beneden). 



Italian writers. — Macchia germinativa, macchia germinativa 

 principale, m. g. laterale, m. g. accessoria. 



Synonyms of the nucleoliniis. — Nucleololus, Nucleollolus 

 (Frenzel) ; Schron'scher Korn, Valentinian vesicle, entostho- 

 blast (Agassiz) ; Centrosoma (Lavdowsky) ; nucleolo-nucleus, 

 endonucleolus (Macfarlane) ; Nucleolinus, Keimpunkt, punctum 

 germinativum (Haeckel). 



III. OBSERVATIONS. 



A. Methods of Study. 



The following observations have been made upon material 

 collected, fixed, stained, and sectioned by myself, with the 

 exception of the preparations of the ova of Rodalia, which 

 were kindly loaned to me by Dr. E. G. Conklin. In no case 

 were observations made upon the living tissue ; however, but 



