13 231 
p- 161; Cleve, Pl. f. the Ind. Ocean and the Malay Archip. p. 23; Schréder, 
Neapel p. 25; Lemmermann, l.c. p. 315. ‘ 
2(r) — 3(rr) — 6(r) — 7(rr) — 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, Pl. 5, f. 5a,b, c,d; 
Van Heurck, Synopsis Pl. 78, f.1—5, Pl. 79, f. 1,2,4; Peragallo, Monogr. 
Rhiz. p.111, Pl. 4, f. 1—5; Grunow, Novara Exp. 1870, p.28; Cleve, 
Diat. f. the Sea of Java p- 11; Atl. Plankt. Organisms p. 349; Pl. f. the 
S. Atl. Ocean and the S. Ind. Ocean p. 935; Pl. f. the Red Sea p. 1034; 
Pl. f. the Ind. Ocean and the Malay Archip.; Leuduger-Fortmorel, |. c. 
p. 36; Lemmermann, |.c. p.315 and p. 317; Schréder, Neapel p. 26. 
The type (about 25 ~ broad) is rather common in some samples, 
but usually it is replaced by var. latissima, corresponding to the var. 
indica of R. alata, and var. cochlea of R. calear 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. Pl. 5, f. 5c; 
R. styliformis var. polydactyla (Castr.) Perag., Monogr. Rhiz. p. 111, Pl. 4, 
f.7; R. polydactyla Castr., Challenger Report 
p. 71, Pl. 24, f£.2; Rh. styliformis var. lata 
Lemmermann, |. c. p. 315 and 351. 
c 
Differs only from the main species in 
the size (about 60—70 yw broad). 
1(rr) — 4(rr) — 10(-+). 
Area: Antarctic Ovean, Malay Archipelago, 
French Pass at New Zealand. 
36. R. Temperei Perag., Diat. Ville- 
franche p. 91, Pl. 5, f. 40, Monogr. Rhiz. 
p.110, P.2, f.3; Cleve, Pl. f. the Ind. Ocean 
and the Malay Archip. p. 22. 
var. acuminata Perag., Monogr. Rhiz. p. 1, 
Pl. 3, f.4; Schréder, Neapel p.25, Pl. 1, f. 6 
(f. inaequalis); Cleve, Atl. Plankt. Organisms . 
p. 336; Limmerm. |. c. p. 317; R. robusta Fig. 8. Rhizosolenia Temperei 
v. recta (nom. nud.) Ostenfeld, Vid. Medd. Peras. var. acuminata Pavag. 
Nath. For, Kiébenh 1898. ». 497 aa whole cell (**). b part of 
ath. For. Kjobenhavn, > De ‘ a cell (72%). ¢ the apex, sho- 
Only the var. aevminata Perag. has been wing the form of the spine 
found and I should think it to be a distinct (44°), 
b a 
