1912] 



YAMANOUCHI—CUTLERIA 



463 



X 





Fig. 10.— Cutler ia multifiia: normal sporelings; a, 20 days after fertilization; b, 

 30 days after fertilization; </, 55 days after fertilization (d represents a part of a spore- 

 ling under the same magnification as a and b, and the whole sporeling is shown in c); 

 the vertical column which is the result of primary growth of the sporeling has not 

 grown since 30 days after fertilization, and the zonal horizontal expansion at the base 

 of the column begins as a secondary structure and develops into the characteristic 

 Aglaozonia form, as shown in b and c; compare with fig. IX. 



