PLANKTON OF THE JAPANESE COAST. 



0.045 mm., 0.0375 mm., and 0,0525 mm. respectively; breadth of girdle, 

 0.06 mm. 



Loc. in Japan : Lake Chügüzi (Nikko ; Nov., 18, 1904). 

 Other known loc. : Europe. 



24. Ceratocorys horrida Stein. (Pl. IV., fig. 25). 



Schutt, 1896, p. 26; fig. 37. — Murr, and Whitt., 1899, p. 329; PL 

 XXX. fig. 5. 



The specimen figured measures : length and breadth of body ca. 

 0.06 mm. ; length of wing 0.06-0.075 mm. ; breadth of marginal list 

 0.025 mm. 



Loc. in Japan : Prov. Tosa. 



Other known loc.: Mediterranean Sea; Pacific and Indian Oceans. 



25. Dinophysis homunculus Stein, f. pedunculata Schm. 



(Pl. V., fig. 40). 



Schm., 1 901, p. 220, fig. 8. 



Total length of body in the specimen shown in fig. 40 b measures 

 0.082 mm. ; breadth, 0.037 mm - > length of the lower prolongation, 

 0.026 mm., and breadth of same, 0.013 mm - 



Loc. in Japan : Provs. of Böshyü (May) and Tosa. 



Other known loc. : Mediterranean Sea ; Indian and Pacific Oceans. 



26. D. Vanhöffenii Ostf. (Pl. V., fig. 41). 



Cleve, 1899, p. 39; Pl. IV., fig. 7. — Id.; 1900a, p. 16; Pl. VIII., 

 fig. 3. — Id., p. 926; fig. 8. — Jörgensen, 1901, p. 19; PI. III., 

 fig- 33- (P' acuminata var. granulata). 

 Dimensions of the specimen represented in fig. 41 b, are ca. 0.04 mm. 

 by 0.033 mm - J those of c, 0.04 mm. by 0.03 mm. 

 Loc. in Japan : Prov. Shima. 



Other known loc. : Northern Atlantic ; Arctic Sea ; Davis 

 Strait ; Yedo Bay (Cleve). 



27. Dìplopsalis lenticula Bergh. (Pl. V., fig. 44). 

 Schutt, 1896, p. 21 ; fig. 31 A-C. 



Loc. in Japan : Prov. Tosa. 



Other known loc. : Azores and Red Sea. 



