312 Naohide Tatsu. 



Wassilieff, a., 'o2.- — Ueber kiinstliche Parthenogenesis des Seeigel-Eies: Biol. 



Centbl. 22 No. 24. 

 Wilson, E. B., '96. — The Cell: ist Ed. New York. 



'01. — A cytological study of artificial parthenogenesis in sea-urchin eggs. 



Experimental Studies in Cytology I: Arch. Entwm. 12. 

 '03. — Experiments on cleavage and localization in the nemertine egg: 



Arch. Entwm. 16. 

 '04. — Cytasters and centrosomes in artificial parthenogenesis: Zool. Anz. 

 28. 

 Yaisu, N., '04. — Aster formation in enucleated egg-fragments of Cerebratulus: 

 Science N. S. 20, No. 521. 



