1913- ^O- S- JAPANESE DIATOMS. 



Chaetoceras rostratuni Lauder. 



Lauder: p. 79, PI. 8, fig. 10. — Okamura: 1907, p. 91, 

 PI. 3, fig. 15, a. 

 Loc. Shima Prov. (Okamuka). Misaki; Misumi; Echigo Prov. (Yendo). 



Chaetoceras convolutum Castr. 



Castracaxe: 1886, p. "j^. — Jörg: 1901, p. 22. — Gran; 

 1904, p. 530, fig. I. Do.: 1906, p. 69, fig. 82. — Yendo: 



191 1, p. 26. — Meunier: 1912, p. 218, PI. XXIV, figs. 17 — 19. 



= C. Brifj/itirellii Gran. 1897 a, p. 10, PI. i, fig. a — c. 



= C. criopJnluni Ci.eve (Non. Castr.) 1897 a, p, 20, PI. i, fig. 6. 

 Loc. Otaru Bay; V'olcano Bay (Yendo). 



Chaetoceras peruvianum Brightw. 



Brightwell: 1856, p. 107, PI. 7, figs. 16 — 18. — Cleve : 



1873 b, p. 8, PI. 2, fig. 8. — Do.: 1897 b, p. 299, fig. 7. — 



Ostenfeld: 1902, p. 238. — Karsten: 1905 — 7, p. 166, Taf. 



XXXI, fig. 4. — Gran: 1906, p. 70, fig. 84. — Schröder: 



1906, p. 337, (with forma rolmstn). — Okamura: 1907, p. 91, 



PI. 4, figs. 67-75. 



Schroder's f. rohusta, in our opinion, has no characters entitfing it 



to a special name. Schröder also reports C. volans Schvtt from Japan; 



but this species should be synonymized with C. criophilum Castr., or, 



according to Cleve, with the present species. 



Loc. Tosa Prov.; Shima Prov. (Okamura). Misaki (Yendo). Eno- 

 shima; Akashi (ScHRr)DER). 



Chaetoceras criophilum Castr. 



Castracane: 1886, p. 78. — ■ Jörgensen: 1901, p. 20. — 

 Gran: 1904, p. 532, fig. 3. — Do.: 1906, p. 71, fig. 85. — 

 Okabi. : 1907, p. 90, PI. 3, figs. 33 — 37, — Karsten: 1905, 

 p. 118, Taf. XV, fig. 8. - Meunier: p. 215, PI. XXIV, figs. 

 8 — 14. — Yendo: 191 i , p. 26. 

 Loc. Kuriles (Okamura). Volcano Bay (Yendo). 



Chaetoceras borealt Bail. 



Bailev: 1854, p. 8, figs. 22 & 23. — Cleve: 1897 a, p. 20, 

 Taf. I, fig. I. — Gran: 1904, p. 533, fig. 5. — Do.: 1906, p. 73, 

 fig- ^7- Okabi.: 1907, p. 90. PI. 3, figs. 18 — 20. — Meunier: 

 1910. p. 214, PI. XXIV, figs. 4 — 7. 



