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9. HOFJiEiSTEii, W. (18.J2) Die Entwickelungsgetchichte der Isoefes lacuslris, L. 

 Abhandl. d. K. S. Ges. d. Wiss. Bd. IV. 



10. Scott, D. (lUOOi Tlie Structure of I><oeles hystrix. Ann. of Bot. vol. XIV. 



11. Shibata, K. (1905) Studien iiber die Chemotaxis der /scete-Spermatozoiden. 



J:dir. f. Wiss. Bot. Bd. XLI. H. 4. 

 V2. Smith, K. W. (1900J The Structure and Development of the Sporophylls and 



Sporangia of Isoetes. Bot. Gaz. vol. XXIX. 

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Ser. 2. Bot. vol. VJII. 



Resume of the Artfcle in Japanese. 



YoSHiTAKA Imai :— Genetic Studies in Morning-Glories. V. 



In the present paper the summary of the known cases of linkage 

 in the Japanese morning glory is given with some new data. Repul- 

 sion data of variegated and punched leaves were obtained in the F.., 

 of a hybrid, the results comfirming the occurrence of the crossover of 

 about 130/0, which is calculated from the coupling segregation. The 

 crossover value of contracted habit and white-margined flower was 

 ascertained, being about l^o. Some flower colors almost always are 

 accompanied by certain flower tube colors. The phenomena may be 

 considered as due to either linkage or multiple allelomorphs. Lastly 

 Miyazawa's remarkable results are criticized and it is pointed out 

 that his data may be most naturally explained by the linkage hypo- 

 thesis. Adding these cases together there are, at present, 8-9 cases 

 of the linkage in this plant. 



