118 AKT. 12. K. YENDO. 



from a fertile specimen that the receptacles or the receptacular 

 ramulets are axillary. This character certainly excludes the plant 

 from the genus Cystoijhyllum and necessitates its reference to 

 Sargassum. Hence the name Sargassum Thunbergii, proposed 

 by O'KuNTZE in the works referred to above, although his 

 generic conception differs from ours, must be preferred according 

 to the rule of priority. In /. typica and /. lalifoUa, the ful- 

 crant leaves in the lower as well as in the middle portions of 

 the fronds are filiform or lanceolate. In f. nipponica, they are 

 almost always transformed into vesicles. Fig. 5 illustrates a por- 

 tion of a fertile lateral branch of the latter form. In it one 

 ramulet has an inflated fulcrant leaf and another a lanceolate 

 one. This character, no doubt, suggests the close affinity of the 

 present species to Turbinariai?) fusiformis. 



That the receptacles are axillaiy or apparently axillary is 

 an important point in separating Turbinaina and Sargassum from 

 the other genera of Facaccce. I prefer to place the present plant 

 and the following one under the genus Sargassum. In my former 

 paper — the Preliminary List — I have referred it with some hesi- 

 tation to the genus Turbina^Ha on the ground that it showed 

 several points of morphological similarity to Turbinaria{?) fusi- 

 formis. The fulcrant leaves, however, of this and of the next 

 species are in the majority of cases foliose and not vesiculiform, 

 and this suggests the propriety of arranging the. two species as is 

 here done. Some of the specimens of this species, especially of 

 /. latifolia, exhibit some resemblance to Sargassum Kjellmanianum. 

 In some sterile specimens, indeed, it is often difficult to distin- 

 guish the two species except by close examination. 



Localities: /. typica-, Higo Prov. (!,); Chikuzen Prov. (M. 

 Yano) (!); Shirikishinai (h.h.f.), Fukuyama (h. h. f.), Esashi 



