— 13 — 



p. 161 ; Cleve, Pl. f. the Ind. Ocean and the Malay Archip. p. 23; Schröder, 

 Neapel p. 25; Lemmermann, 1. c. p. 315. 

 2 (r) - 3 (it) - 6 (r) - 7 (it) - 10 (+). 



Area: Northern Atlantic Ocean, especially in the North Sea and the English 

 Channel, Mediterranean, Red Sea, Gulf of Aden, Malay Archipelago, China Sea, 

 Yeddo Bay, Cook Strasse (S. of New Zealand). — Neritic species. 



35. R. styliformis Btw., Micr. Journ. 1858, p. 96, PI. 5, f. 5a,b,c,d; 

 VanHeurck, Synopsis PI. 78, f. 1 — 5, PI. 79, f. 1,2,4; Peragallo, Monogr. 

 Rhiz. p. Ill, PL 4, f. 1—5; Grunow, Novara Exp. 1870, p. 28; Cleve, 

 Diat. f. the Sea of Java p. 1 1 ; Atl. Plankt. Organisms p. 349 ; PI. f. the 

 S. Atl. Ocean and the S. Ind. Ocean p. 935; PI. f. the Red Sea p. 1034; 

 PI. f. the Ind. Ocean and the Malay Archip.; Lenduger-Fortmorel, 1. c. 

 p. 36 ; Lemmermann, I.e. p. 315 and p. 317; Schröder, Neapel p. 26. 



The type (about 25 fx broad) is rather common in some samples, 

 but usually it is replaced by var. latissima, corresponding to the var. 

 indica of B. alata, and var. cochlea of B. calcar avis. 



10 (+). 



Area: Most parts of the Atlantic Ocean, Mediterranean, Red Sea, Indian 

 Ocean, Malay Archipelago, Pacific Ocean, Antarctic Ocean. 



R. styliformis Btw., var. latissima Btw., Microsc. Journ 



B. styliformis var. polydactyla (Castr.) Pera 

 f. 7 ; B. polydactyla Castr., Challenger Report 

 p. 71, PI. 24, f. 2; Rh. styliformis var. lata 

 Lemmermann, I.e. p. 315 and 351. 



Differs only from the main species in 

 the size (about 60—70 fx broad). 



l(rr) - 4 (rr) — 10(+). 

 Area: Antarctic Ocean, Malay Archipelago. 

 French Pass at New Zealand. 



36. R. Temperei Perag., Diat. Ville- 

 franche p. 91, PI. 5, f. 40, Monogr. Rhiz. 

 p. 1 10, P. 2, f. 3 ; Cleve, Pl. f. the Ind. Ocean 

 and the Malay Archip. p. 22. 



var. acuminata Perag., Monogr. Rhiz. p. 1 , 

 PI. 3, f. 4; Schröder, Neapel p. 25, Pl. 1, f. 6 

 (f. inaequalis); Cleve, Atl. Plankt. Organisms 

 p. 336; Limmerm. 1. c. p. 317; B. robusta 

 v. recta (nom. nud.) Ostenfeld, Vid. Medd. 

 Nath. For. Kjöbenhavn, 1898, p. 427. 



Only the var. acuminata Perag. has been 

 found and I should think it to be a distinct 



g., Monogr. Rhiz. 



Fig. 8. Rhizosolenia Temperei 

 Perag. var. acuminata Parag. 

 a a whole cell (^). b part of 

 a cell (— p). c the apex, sho- 

 wing the form of the spine 



(-?-)• 



