— 15 — 



Chaetoceras Ehbg. 



39. C. anglicum (Grim.) Ostf. ms. ; C. (furcellatus Bail, var.) angli- 

 cus Grun. in Van Heurck, Syn., Pl. 82, f . 3 ; C. didymus v. longicruris 

 Cleve, Phytoplankton p. 21, Pl. I, f. 11, non f. 17; Schröder, Neapel p. 27; 

 Cleve, Atl. Plankt. Organisms p. 301; PL f. the Red Sea, p. 1033; PI. f. 

 the Indian Ocean and the Malay Archip. p. 19; C. longicrure Ostenfeld 

 & Schmidt, PI. f. the Red Sea p. 154. 



There is no doubt that the figure in Van Heurck, Synopsis PI. 82, 

 f. 3 represents the species which has been named longicruris by Cleve, 

 and consequently the older name anglicus must have the priority. 



2 (rr) - 6 (rr) - 7 (it) — 10 (r). 



Area: Subtropical Atlantic Ocean, Mediterranean, Red Sea and Gulf of 

 Aden, Gulf of Bengal, Malay Archipelago. 



40. C. An rivillii Cleve, Pl. f. the Ind. Ocean and the Malay Archip. 

 p. 18 and p. 54, P. 8, f. 10. 



10 (IT). 



Area: Tropical Atlantic Ocean (7° N. 53° W.), Malay Archipelago. 



41. C. breve Schutt, Ber. d. Deutsch-Botan. Gesellsch., 1895, p. 38, 

 f. 4 a, b; Gran, Nyt Magazin Naturv., Kristiania 1900, p. 121; Ostenfeld, 

 ibidem 1901, p. 295 , f. 6; Cleve, Pl. f. the Indian Ocean and the 

 Malay Archip. p. 18; C. didymus 

 var. Mentalis Cleve, Phytoplankton 

 p. 21, Pl. I, f. 18; C. Mentalis 

 Cleve, K. Sv. Vet. Akad. Handl. 

 32, No. 8, 1900, p. 25, f. 9; Atl. 

 Plankt. Organisms p. 304. 



Professor Cleve to whom I 

 sent my figure (fig. 10) thinks that 

 the form belongs to the C. breve 

 Schritt, and I can agree with him. 

 It resembles striking small forms 

 of C. Lorenzianum but is easily 

 recognisable by the single chro- 

 matophore and the smooth awns. 



2 (it) — 6(rr) - 7 (it) - 10 (it). 



Area: Along the coasts of 

 Europe from Westmannaö at Island 

 southwards to the English Channel ; 

 Malay Archipelago. 



Fig. 10. Chaetoceras breve Schiitt 



42. C. calvum Cleve, Pl. f. the Ind. Ocean and the Malay Archip. 

 p. 18 and p. 54, PI. 8, f. 11. 



