126 



K. OKAMURA. 



Other known loc. : Red Sea ; Indian, Pacific and Atlantic Oceans. 

 2. T. Thiebauti Gomont. (Pl. VI., fig. 46). 



Gomont, 1893, p. 217; Pl. VI., figs. 2-4. — Schütt, 1893, p. 40; fig. 

 31 {Heliotrichiim radians Wille). — Wille, 1 903, p. 17 ; fig. 13. 

 The filaments (fig. 46 b) measure o.oo5-o.oi6 mm. in thickness. 

 Loc. in Japan : Prov. Tosa. 



Other known loc. : Indian, Pacific and Atlantic Oceans. 



II. Chlor op hy cete. 



3. Halosphsera viridis Schmitz. (Pl. III. fig. 16). 



Schmitz, 1887, pp. 67-92; Pl. III. — Gran, 1902, p. 12; T. I., figs. 

 10-15. 



Loc. in Japan : Shirahama in Prov. Böshyü. 



Other known loc. : Atlantic Ocean ; Mediterranean Sea. 



III. Silicoflagellata. 



4. Dictyocha fìbula Ehrb. (PI. III., fig. 10). 



Kützing. 1849, pp, 143-144. — Id., 1865, p. 140. — Lemmermann, 

 1 901, p. 260 ; T. X., fig. 24. — Id., 1903, p. 28 ; fig. 92. 

 Loc. in Japan : Provinces of Tosa, Ise, Mikawa and Böshyü. 

 Other known loc.: Baltic Sea, North Sea, Atlantic Ocean, Mediter- 

 ranean Sea. 



5. D. fibula Ehrb. var. stapedia (Haeckel) Lemm. (PI. III., fig. 11). 

 Kützing, 1865, p. 140; PI. XXL, fig. 23. — Lemm., 1901, p. 261. — 



Id., 1903, p. 29, fig. 96. 

 Loc. in Japan : Prov. Tosa 



Other known loc. : Atlantic, Pacific and Indian Oceans. 



6. Distephauus speculum (Ehrb.) Haeckel var. pentagonus f. armata 



Lemm. (PI. III., fig. 12). 

 Lemm., 1901, p. 264 ; T. XI , fig. 20. 

 One side of basal ring of the specimen figured measures 0.0225 mm. 

 in length. 



