IP] * t A- # 3C ^ ipa 3 ? * ii? -> ^ jft 



7 # /v- 7 V K, 7 t )> y f y ^. 



gS C H JK- 1 : 6 *.**?, Ulva reticulata Forsk. / @ ^ *. 2 : 

 ^,-f.-3 : fit / If, 



/ 



Acetabularia minutissima Okam. n. sp. 



Nonit Japi ! Hina-kasanori, 

 PL. C, Fig, 7-1 1. 



Fronds tufted, very minute, rather thickly calcified ; stem scarcely 

 5 mm long ; discs scarcely 3 mm. in diameter, shallow-cup shaped, 

 composed of about 16 oblong-cuneate round-headed utriculi which in- 

 cludes globular spores. 



Hab. : Futae (Amakusa Isls. ; in the depth of 3 fathoms) ; Prov. 

 Hyuga (on Ceratodictyon spongioides col. by Yendo). Spores : 

 summer. 



Remarks : Plant distinguished by its smallest but matured frond 

 with the smallest utriculi. 



PL. C. Fig. 1 : fronds of Acetabularia minutissima Okam. n. 

 sp. in nat. size (from Futae). Fig. 8 : another frond not decalcified 

 (from Prov. Hyuga), ~. Fig. 9 : one of fronds from Futae notdecal" 

 cified, ip. Fig. 10 : utriculi decalcified (from Futae), 800 /< broad 

 in the widest part, ~. Fig. 11 : spore, 82 // in diam., 1 ^. 



