41 6 EDWIN G. CONKLIN. 



Schiller, L. 



'09 Ueber kunstliche Erzeugung primitiver Kernteilungsformen bei Cyclops. 



Arch. Entw. Mech., 27. 

 Strasburger, E. 



'08 Chromosomenzahlen, Plasmastructuren, Vererbungstrager und Reductions- 



teilung. Jahrb. wiss. Bot., 45. 

 Vejdowsky, Fr. 



'12 Zum Problem der Vererbungstrager. Konigl. Bohm. Gesell. der Wiss. 



Prag. 

 Wasielewski, W. 



'02, '03 Theoretische und experimentelle Beitrage zur Kentniss der Amitose, 



I., II. Jahrb. wiss. Bot., 38, 39. 

 Wenrich, D. H. 



'16 The Spermatogenesis of Phrynotettix magnus, etc. Bull. Mus. Comp. 



Zool., 60. 

 Young, R. T. 



'13 The Histogenesis of the Reproductive Organs of Taenia pisiformis. Zool. 

 Jahrbucher, 35. 



DESCRIPTION OF FIGURES. 



FIGS. 1-60 represent whole eggs of Crepidula pi ana which had been fixed, 

 stained and mounted. All figures were drawn with camera lucida under Zeiss 

 apochromatic objective 3 mm. Horn. Im., Comps. ocular 4. As drawn they repre- 

 sent a magnification of 333 diameters; in the process of reproduction they have 

 been reduced about one third. 



FIGS. 1-18 represent eggs which had been subjected to increased temperature. 



