20 



ART. 17. — N. YATSU. 



4 V 



c 



2 defective (Fig. 18. G. H). 

 nearly normal (Fig. 18 1). 



Fig. 18. 



A B, C, D, r and F, .pilidia produced from the upper (piartet; G, H 

 and 1, pilidia from the hiwer quartet 



In the main the result agrees with Zeleny's. It is remark- 



