Biologisches Centralist. 



Unter Mitwirkung von 

 Dr. K. Goebel und Dr. R. Hertwig 



Professor der Botanik Professor der Zoologie 



in Miinchen, 



herausgegeben von 



Dr. J. Rosentlial 



Prof, der Physiologic in Erlangen. 



Der Abonnementspreis fur 12 Hefte betragt 20 Mark jahrlich. 

 Zu beziehen durch alle Buchhandlungen und Postanstalten. 



Die Herren Mitarbeiter werden ersucbt, alle Beiti-age aas dem Gesamtgebiete der Botanik 

 an Herrn Prof. Dr. Goebel, Miinchen, Loisenstr. 27, Beitrage aus dem Geblete der Zoolog-ie, 

 vgl. Anatomic nnd Entwickelungsgeschichte an Herrn Prof. Dr. R. Hertwig, Miinchen, 

 alte Akademie, alle iibrigen an Herrn Prof. Dr. Rosenthal, Erlangen, Physiolog. Institut 



einsenden zu wollen. 



Bd. XXXIlT SO. Oktober 1913. Jte 10. 



Inhalt: Toyama, On certain chavacteristics of the Silk- worm which are apparently non-Mendelian. 

 "Gross, fiber intermediiire und alternative Wrerbung. Huxley, A Disharmony in the 

 Reproductive Habits of the Wild Duck (Anas host-has L.). - Tschachotin, Die mikro- 

 skopische Strahlenstichmethode, eine Zelloperationsmethode. Comes, Eft'etti della decapi- 

 tazione in Calotermes jlavicollis e in altri Artropodi. Schone, Die heteroplastische und 

 homooplastische Transplantation. Jleyer, Die Zelle tier Bakterien. IX. Internationale!' 

 Physiologen-Kongress IV 13. 



On certain characteristics of the Silk-worm which 



are apparently non-Mendelian. 



By K. Toyama. 



(The Zoological Institute, College of Agriculture, Tokyo Imperial University.) 



Since the discovery and confirmation of Mendelian principles 

 in 1900 by three independent workers, Correns, Tschermak and 

 De Vries, a great many experiments have been carried on by 

 many eminent biologists. As a result, the theory now stands on 

 firm ground, supported by many facts verified by experiments which 

 have been systematically carried out, and thus has been rendered 

 possible that rapid advance which has taken place in the science 

 of Genetics. 



In the first part of the last ten years when there were only 

 a few experiments systematically carried on after Mendelian methods, 

 there were enumerated many non-Mendelian cases in the inheritance 

 of characteristics, and even now some anomalous cases exist; but 

 as the experiments advanced in number and became more accurate, 

 we gradually perceived that we could easily show these so-called 

 anomalous cases to be in accordance with the Mendelian Theory. 



In the breeding of silk-worms, we have found certain cases in 

 which Mendelian characteristics show themselves to be non-Mendelian 

 in heredity. I shall describe them in the following pages. 

 XXXII. ' 39 



