OOGENESIS IN PHILOSAMIA 29 
Rickert, J. 1892 Zur Entwickelungsgeschichte des Ovarialeies bei Selachiern. 
Anat. Anz, Bd. 7. 
Scuierp, W. 1909 Vergleichende Untersuchung der Eireifung, u.s.w. Arch. 
{f. Zellforsch., Bd. 2. 
ScuockaErRT, R. 1902 L’ovogénese chez le Thysanozoon brocchi, Il. La Cel- 
lule, tom. 20. 
Semer, J. 1913 Das Verhalten der Geschlechtschromosomen bei Lepidop- 
teren. Zool. Anz., Bd. 41, no. 6. 
Strvens, N. M. 1904 Further studies on the ovogenesis of Sagitta. Zool. 
Jahrb., Bd. 21. 
1906 a Studies on the germ-cells of Aphids. Carnegie Institution. 
Pub. No. 51. 
1906 b Studies on spermatogenesis. II. A comparative study of 
the heterochromosomes in certain species of Coleoptera, Hemiptera, 
and Lepidoptera, with especial reference to sex determination. Car- 
negie Institution Pub. No. 36. 
1909 An unpaired heterochromosome in the Aphids. Jour. Exp. 
Zool., vol. 6. 
Tennant, D. H. 1912a The behavior of the chromosomes in cross-fertilized 
echinoid eggs. Jour. Morph., vol. 23. 
1912 b Studies in cytology. I. A further study of the chromosomes 
of Toxopneustes variegatus. II. The behavior of the chromosomes 
in Arbacia-Toxopneustes crosses. Jour. Exp. Zool., vol. 12. 
Witson, E. B. 1912 Studies on chromosomes. VIII. Observations on the 
maturation-phenomena in certain Hemiptera and other forms, with 
considerations on synapsis and reduction. Jour. Exp. Zool., vol. 
ls), TIO), She 
von WINIWARTER, H., ET SAINTMONT, G. 1908 Nouvelles recherches sur 
Vovogénése de l’ovaire des mammiféres (chat). Arch. de Biol., tom. 24. 
Wo.utereEcK, R. 1898 Zur Bildung und Entwicklung des Ostracodeneies. Zeit. 
f. wiss. Zool., Bd. 64. 
