610 Otto Maas, Experim. Beitr. zur Entwicklungsgeschichte der Medusen. 



1903. E. B. Wilson, Experiments on Cleavage and Localization in the Nemer- 



tine Egg. Arch. Entw.-Mech. XVI. p. 411—460. 11 Fig. 



1904«. Experimental Studies on Germinal Localization I. The Germ 



Regions in the Egg of Dentalium. Journ. Exp. Zool. Vol. I. p. 1 — 72. 

 100 Fig. 



1904 ß. — - II. Experiments on the Cleavage Mosaic in Patella and Dentalium 

 Ibid. p. 197—268. 118 Fig. 



1904. N. Yatsu, Experiments on the Development of Egg-fragments in Cere- 



bratulus. Biol. Bull. Vol. VI. p. 123-136. 5 Fig. 

 1904. Ch. Zelenyi, Experiments on the Localization of Developmental Factors 



in the Nemertine Egg. Journ. Exp. Zool. Vol. I. p. 293—329. 19 Fig. 

 1895. E. ZojA, Sullo sviluppo dei blastomeri isolati di alcune Meduse. Arch. 



Entw.-Mech. L p. 578—596. Taf. XXI— XXXIII and II. p. 1—37. 



Taf. I— IV. 



