— 20 — 



53. (]. peruvianiim Btw., Microsc. Journ. 185G, p. 107, PI. 7, f. Ki 

 — 18; Cleve, Fish. Board for Scotland, 1896, p. 299, f . 7 ; Leuduger-Fort- 

 morel. I.e. p. 37; Cleve, PL f. the hidian Ocean and the Malay Archi|). 

 p. 19 ; PI. f. the S. Atlantic and the S. hidian Ocean, p. 929 ; PI. f. the 

 Red Sea p. 1033; Lemmermann I.e. p. 317. 



This species is very variable; several new species have been described 

 upon forms of it, but it seems incorrect to me to give them specitic 

 range. I should think they are to be arranged in three groups after their 

 coarseness and size, viz. : 



f. 1, volans (Schiitt). Rather slender, awns rather thin: C. volans 

 Schiitt, Bar. d. Deutsch. Botan. Gesellsch. 1895, f. 20, C. currens Cleve, 

 Fish. Board for Scotland, p. 299, f. 8. Arctic and northern Atlantic form. 



f. 2, typica. Intermediate between 1 and 3; C. petiwianuni Btw. 

 I.e.; Cleve, I.e. p. 299, f. 7 ; Schroder, Neapel p. 29, PL 1, f. 4 (L gra- 

 cilis). Tropical parts of the Oceans. 



f. 3, rohnsta Cleve. Coarse and with coarse awns. C. peruvianum 

 V. robustum Cleve, Diat. f. the Sea of Java, 1873, PL 2, f. 8; C.boreale? 

 Lauder, Transact. Microsc. Soc. Vol. 12, 1863, PL 7, f. 7; C. robustum OstL 

 in Ostenfeld & Schmidt, PL f. the Red Sea, etc. p. 145; C. curvatum Castr., 

 Challenger Report p. 78. Tropical and Antarctic parts of the Oceans. 



f. 2: 1 (rr) - 2 (rr) - 3 (rr) - 6 (r). 

 f. 3: l(rr) - 10 (+)• 



Area: Arctic and Atlantic Ocean, Mediterranean, Red Sea, Indian Ocean, 

 Malay Archipelago, China Sea, Pacific Ocean, Antarctic Ocean. 



54. C. pseudocrinitum Ostf., Nyt Magaz. Naturv., Kristiania, 1901, 

 p. 300, f. 11 ; C. crinitum Gran, Norske Nordhavs Expedition, Protophyta 

 1897, p. 22, PL 4, f. 51, non Schutt, 1895. 



This little species which I have described from Danish waters and 

 which Gran has found on the Norwegian coasts, was also met with in 

 the Gulf of Siam, but sparingly. 



10 (rr). 



Area: Limfjord, Kattegat, Coast of Norway. 



55. €. Ralfsii Cleve, Diat. f. the Sea of Java 1873, p. 10, PL 111, 

 f. 15; Leuduger-Fortmorel, 1. c, p. 37 ; de Wildeman, 1. e. p. 134; Cleve, 

 PL L the Indian Ocean and the Malay Archipelago, p. 19 and p. 55; non 

 Van Heurck, Syn., PL 82 bis, f. 3. 



The chromatophore is solitary and in front. 



2(rr) - 6(rr). 



Area: Malay Archipelago. 



56. C. rostratuin Laud., Trans. Microsc. Soc. 1864, p. 79, PL 8, 

 f. 10; Cleve, PL L the Ind. Ocean and the Malay Arcliip. p. 19; Ostenfeld 

 & Schmidt, PL f. the Red Sea, etc., p. 155. 



