- 8 - 



p. 323 ; PI. f. the S. Atlantic and the S. hidian Ocean p. 932 ; PI. t. the 



hidian Ocean and the Malay Arcliip. p. 21. 



2 (IT) - G(r). 



Area: Eastern and Northern Atlantic Ocean, Antarctic Ocean, South Indian 

 Ocean at 42°- 45° S. and 3° W. to 48° E. 



20. D. inediterraneus Perag., Monogr. Rhiz. p. 104, PI. 1, f. 8, 9; 

 Schroder, Neapel p. 24; Gleve, PI. f. the S. Atl. and S. Ind. Ocean p. 932; 

 PL f. the Red Sea, Ofv. af K. Sv. Vetensk. Akad. Forhandl. 1900, No. 9 

 [1901], p. 1033; All. Plankt. Organisms p. 324; PL f. the bidian Ocean 

 and the Malay x'Vrchip. p. 21 ; Ostenfeld, Vid. Medd. Nath. For. Kjebenhavn, 

 1898, p. 428; Ostenfeld & Schmidt, PL f. the Red Sea, etc. p. 157. 



2(+) - 4(rr) - 5 (rr) - 6 (+) - 7 (rr) - 10 (rr). 



Area: Temperate North Atlantic Ocean, Tropical Atlantic at Puerto Ca- 

 hello. Southern Atlantic and Indian Ocean at 42°— 44° S. and 3° W.— 48° E., 

 Mediterranean, Red Sea, Gulf of Aden, Gulf of Bengal, Malay Archipelago. 



Lauderiopsis Ostf. 



21. L. costata Ostf. in Ostenfeld & Schmidt, PL L the Red Sea, etc., 

 p. 158, L 10. 



This genus forms a connecting link between Lauderia, DacUjUosolen 

 and Guinardia. 



2 (r) - 6 (+). 



Area: Red Sea. 



Guinardia Perag. 



22. C. flaccida (Gastr.) Perag., Monogr. Rhiz. p. 107, PL 1, f. 3—5; 



de Wildeman, I.e. p. 122; Schroder, Neapel, !>. 24; Ostenfeld & Schmidt, 

 PL f. the Red Sea etc., p. 158; Cleve, Atlant. Plardct. Organisms p. 328 ; 

 PL f. the Indian Ocean and the Malay Archi|). p. 21 ; lihizosolenia? flac- 

 cida Gastr. Ghallenger p. 74, PL 29, f. 4. 

 3 (r) - (J (rr) - 10 (rr). 



Area: Temperate Atlantic Ocean from Norway southwards to 10^ N., Me- 

 diterranean, Red Sea, Arafura Sea, Malay Archipelago. 



Rhizosolenia (Ehbg.) Btw. 



23. R. alata Rtw., Micr. Journ. 1858, p. 96, PL 5, f. 7 ; Gleve, Diat. 

 f. the Sea of Java, 1873, p. 11; Leuduger-Fortmorel, I.e. p. 30; de Wil- 

 deman, I.e. p. 123; Grunow, Novara Exp. p. 28; Peragallo, Monogr. Rhiz. 

 p. 115, PL 5, f. 11: Schroder, Neapel p. 26; Ostenfeld & Schmidt, Red 

 Sea p. 159; Cleve, Phytoplankton p. 24; Atlant. Plankt. Organisms p. 337; 

 Red Sea p. 1034; PL f. the Atlant. and Indian Ocean p. 934; PL f. the 

 Ind. Ocean and the Malay Archip. p. 22. 



