438 



THE AMEBIC AN NATURALIST [Vol. XLIX 



cytological eccentricities should be looked into. In them 

 will probably be found the key to the situation. The 

 CEnotheras may be mentioned as a case in point. Their 

 heredity in many cases is not what would be expected by 

 analogy with other plants. We know that in some ways 

 the behavior of their chromosomes is irregular. Further 

 study will probably show that this is the sole cause of their 

 anomalous heredity. 



LITERATURE CITED 



Allen, C. E. 



05. Nuclear Division in the Pollen Mother-cells of Lilium canadense. 

 Ann. Bot., 19: 189-258. 



99. Studies on Reduction in Plants. Bot. Gas., 28 : 1-26. 

 iV. L. 



10. The Mechanism of Nuclear Division. Ann. Bot. 24: 653-665. 

 P. 



10. Ueber die Beziehunjr zwischen dem Chromatin und der Ent- 



Chromo-oim ^tudicn I. Arrhn-. f. '/, U f<,r.srh .. 1 : 45" 1-514. 19«*. 

 II. Ibid., 2: 201-278. 



892. Die Entstehung des Gegensatzes zwischen den Geschlechtszellen 

 und den somatischen Zellen hci Asraris nu t i„h>rc V hala. Sitzber. 

 Gesell. Morph. u. Physiol. Miinchen., Band 8. 



002. Mehrpolige Mitosen als Mittel zur Analyse dos Zellkerns. Verh. 

 Phys. u. Med. Gesell. zu Wiirzburg., N. F., 35. 



;es, C. B. 



914. Direct Proof Through Xon-disiunction that the Six linked Genes 



902. A Cytological Basis for the Mendelian laws. Bull. Tori 



Club, 29: 657-661. 



903. Studies in Plant Hybrids: The Spermatogenesis of Hybri 



rid IVa-. 



