LIST OF CERATIUM IN JAPAN. 



127 



Ceratium gravidum Gourr. 



(Fig. 21). 



Cleve, '02, p, 27. — '01, p. 222. 



Schutt, '93, p. 269, fig. X a-b, (without name). 



Gourret, '83, p. 58, PI. I, fig. 15. 



Loc. in Japan : Kushimoto in Prov. Kü (T. Nishikawa coll.). 



Other known loc.: Mediterranean Sea; Indian Ocean ; the At- 

 lantic. 



Ceratium lineatum Ehb. 



(Fig. 20). 



Cleve, '02, p. 27. — '01, p. 224. 

 Gran, '02, p. 193 and p. 197. 

 Schutt, '93, p. 266, fig. II ? 



In reference to the diagnosis given by Gian and to the figure of C. 

 lineatimi var. robusta given in Cleve ('00 b, p. 925, fig. 6), we have re- 

 ferred the specimens to this species, but we are not certain whether 

 they represent the typical species or a variety. 



Loc. in Japan : Kushimoto in Prov. Kii (T. Nishikawa coll.). 



Other known loc. ; the Atlantic. 



Ceratium fusus Duj. 



(Figs. 22, 23). 



Cleve, '02, p. 26. — '01, p. 220. — '97 b, p. 26. 

 Gran, '02, p. 197. 



Schutt, '93, p. 266, fig. I ; p. 309, fig. IX. 



Gourret, '33, p. 54, PI. IV, fig. 66? (C. pellucidum Gourr.). 



Bütschli, '81, Taf. LIV, fig. 2a. 



As shown. in our fig. 22, the rudimentary horn is almost on the 

 verge of disappearance, making the general appearence approach that 

 of Gourret's fig. 66. 



