480 Chromosomes of Anasa Tristis and Anax Junius 
Foor, K., and STrosBett, E. C., o7a.—The “ Accessory Chromosome” of Anasa 
tristis. Biol. Bull., 12. 
o7b.—A Study of the Chromosomes in the Spermatogenesis of Anasa 
tristis. Amer. Journ. Anat., 7. 
JANSSENS, F. A., 05.—Spermatogénése dans les Batraciens. III. Evolution 
des auxocytes males du Batracoseps attenuatus. La Cellule, 22. 
LeratT, P., 05.—Les phénoménes de maturation dans l’ovogénése et la sperma- 
togenése du Cyclops strenuus. la Cellule, 22. 
McGILL, CAROLINE, 04.—The Spermatogenesis of Anax junius. Univ. Missouri 
Studies, 2. 
o6.—The Behavior of the Nucleoli during Odgenesis of the Dragon-fly. 
Zool. Jahrbr., 23. 
PAULMIER, F. C., 99.—The Spermatogenesis of Anasa tristis. Journ. Morph., 15. 
SCHREINER, A., und K. E., 04.—Die Reifungsteilungen bei den Wirbeltieren. 
Anat. Anz., 24. 
——— 05.—Ueber die Entwicklung der mannlichen Geschlechtszellen von 
Myxine glutinosa (L). Arch. de Biol., 21. 
—— o6oa.—Neue Studien tiber die Chromatinreifung der Geschlechtszellen. 
I. Die Reifung der mannlichen Geschlechtszellen von Tomopteris 
onisciformis, Eschscholtz. Arch. de Bio., 22. 
o6b.—Neue Studien iiber die Chromatinreifung der Geschlechtszellen. 
II. Die Reifung der mannlichen Geschlechtszellen von Salamandra 
maculosa (Laur.), Spinax niger (Bonap.) und Myxine glutinosa 
(L). Arch. de Biol., 22. 
——— o06.—Neue Studien tiber die Chromatinreifung der Geschlechtszellen. 
III. Die Reifung der Geschlechtszellen von Ophyotrocha puerilis 
Clprd.-Mecz. Anat. Anz., 29. 
——— o7.—Neue Studien tiber die Chromatinreifung der Geschlechtszellen. 
IV. Die Reifung der Geschlechtszellen von Enteroxenos Ostergreni. 
Bonn. Vidsk. Selsk. Skr., Kristiania. 
STEVENS, N. M., o5.—Further Studies on the Ovogenesis of Sagitta. Zool. 
Jahrb., 21. 
o6.—Studies on the Germ Cells of Aphids. Carnegie Institution of 
Washington, Publication No. 51. 
Witson, E. B., 05a.—Studies on Chromosomes. I. Journ. Exper. Zool., 2. 
05b.—Studies on Chromosomes. II. Ibid., 2. 
o6.—Studies on Chromosomes. III. Ibid., 3. 
o7.—The Case of Anasa tristis. Science, 25. 
v. WINIWARTER, H., 00.—Recherches sur Vovogénése et Vorganogénése de 
lovaire des Mammiféres (Lapin et Homme). Arch. de Biol., 17. 
Norre.—All of the drawings were made as carefully as possible with the 
camera under a 2 mm. Zeiss apochromatic and compensation-ocular 12. 
They were then enlarged with a drawing camera two and a half times, cor- 
rected by comparison with the objects, and reduced by one-third in repro- 
duction. Their final magnification as they appear here is about 3583 diame- 
ters. Although the chromosomes are represented as accurately as possible, 
and are in no sense schematized, an attempt has not been made to show the 
details of the achromatic structures. 
