PLANKTON OF TUE JAPANESE COAST. 



129 



antapicals in one and the same plane as is the case in the specimens 

 observed by me. For sake of future comparison I have given two figures 

 of the present form. 1'ossibly a distinct species. 

 Loc. in Japan : Prov. Tosa. 



18. C. horridum (Cleve) Gran. (Pl. IV., fig. 21 ; fig. 23 (abnormal form)). 

 Gran, 1902, p. 194. — Ostf., 1903, p. 584; figs. 136-139 — Cleve, 



1897, p. 302 ; fig. 4 (C. tripos v. horrido). — Schutt, 1893, p. 70 ; 

 fig« 35» IV. (C. tripos var. scotica)— Jörgensen, 1900 b, p. 42 ; Pl. 

 I., fig. io. (C. tripos var. macroccras f. intermedia)— Okam. and 

 Nishikawa, I904, p. 122; Pl. VI., fig. 5. (C. arcuatimi ? or C. 

 longipes ?). 



In accordance with Ostenfeld's view, I have referred the several forms 

 shown in figs. 21 a-h to C. horridum. Most of the forms seem to represent 

 f. intermedia (a-c) ; and if it be justifiable to give a name to the rest (d-h), I 

 shall call these f. laevis. Schröder has illustrated, in his " Phytoplankton 

 des Golfs von Neapel," Taf. L, fig. h-n, various forms of C. tripos var. 

 macroccras, all of which may be made, I think to belong to this species. 



The specimen figured in fig. 23 seems to me to be an abnormal form 

 probably of this species having two right antapical horns instead of one. 



Loc. in Japan ; Provinces of Böshyü (May), Shima(Feb.), and Tosa. 



Other known loc. : Atlantic and Indian Oceans. 



19. C. ranipes Cleve. (Pl. III., fig. 6.) 



Cleve, 1900 a, p. 15 ; Pl. VII., fig. 1. — Id., 1901, p. 230. — Schröder, 

 1901, p. 16; Taf. I, fig. o-p. — Okam. and Nishikawa, 1904, p. 

 124 ; fig. 12. 



Loc. in Japan : Prov. Böshyü (May) ; Kushimoto in Prov. Kii 

 (Nishikawa). 



Other known loc. : Tropical Atlantic ; in the Equatorial, the 

 Antilles and the Florida current ; around the Azores. 



20. C. VUltur Cleve. (Pl. III., fig. I.) 



Cleve, 1900 a, p. 15 ; Pl. VII., fig. 5. — Ostf. and Schm., 1901, p. 167 ; 



fig. 20. — Okam. and Nishikawa, Pl. VI., fig. 8. 

 As will be seen from the figures given, the uppermost individual in a 



