15 233 
Chaetoceras Ehbg. 
39. ¢. anglicum (Grun.) Ostf. ms.; C. (fwreellatus Bail. var.) angli- 
eus Grun. in Van Heurck, Syn., Pl. 82, f. 3; C. didymus v. longicruris 
Cleve, Phytoplankton p.21, Pl.I, f.11, non f.17; Schréder, Neapel p. 27; 
Cleve, Atl. Plankt. Organisms p. 301; Pl. f. the Red Sea, p. 1033; Pl. f. 
the Indian Ocean and the Malay Archip. p.19; C. longicrure Ostenfeld 
& Schmidt, Pl. f. the Red Sea p. 154. 
There is no doubt that the figure in Van Heurck, Synopsis Pl. 82, 
f, 3 represents the species which has been named longicruris by Cleve, 
and consequently the older name anglicus must have the priority. 
Q(rr) — 6(tr) — 7(rr) — 10(r). 
Area: Subtropical Atlantic Ocean, Mediterranean, Red Sea and Gulf of 
Aden, Gulf of Bengal, Malay Archipelago. 
40. (. Aurivillii Cleve, Pl. f. the Ind. Ocean and the Malay Archip. 
p. 18 and p. 54, P.8, f. 10. 
10 (rr). 
Area: Tropical Atlantic Ocean (7° N. 53° W.), Malay Archipelago. 
41. (@. breve Schiitt, Ber. d. Deutsch-Botan. Gesellsch., 1895, p. 38, 
f.4a,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. hiemalis Cleve, Phytoplankton 
p. 21, PL I, f. 18; C. hiemalis 
Cleve, K. Sv. Vet. Akad. Hand. 
32, No. 8, 1900, p.25, f. 9; Atl. 
Plankt. Organisms p. 304. 
Professor Gleve to whom I 
sent my figure (fig. 10) thinks that 
the form belongs to the C. breve 
Schtitt, and I can agree with him. 
It resembles striking smal] forms 
of C. Lorenzianum but is easily 
recognisable by the single chro- 
matophore and the smooth awns. 
Q (rr) — 6 (rr) — 7(rr) — 10 (rr). 
Area: Along the coasts of 
Europe from Westmannaé at Island 
southwards to the English Channel; — pig. 10, Chaetoceras breve Schiitt (222), 
Malay Archipelago. u 
42, ( calvum Cleve, Pl. f. the Ind. Ocean and the Malay Archip. 
p. 18 and p. 54, PI8, f. 11. 
