— 24 — 



Area: Red Sea, Malay Archipelago; a very small form occurs in the sub- 

 tropical N. Atlantic Ocean (Cleve). 



65. E. zodiacus Ehbg., Kreideth. p. 71, PI. 4, f. 8; Leuduger-Fort- 

 morel, 1. c. p. 40; Cleve, Diat. f. the Sea of Java p. 7; Atlant. Plankt. 

 Organisms p. 326; PI. f. the Ind. Ocean and the Malay Archip. p. 21. 



10 (rr). 



Area: Neritic species found along the coasts of West-Europe, Malay 

 Archipelago, Yeddo Bay in Japan, Puget's Sound. 



Climacodium Grun. 



66. C. Fraunfeldianum Grun., Novara Exp. 1870, 102, Pl. I a, f. 24; 



Ostenfeld & Schmidt, PI. f. the Red Sea, etc. p. 1 56 ; Cleve, Atlant. Plankton 

 Organisms p. 314; C. Fraunfeldii Cleve, Pl. f. the Red Sea, p. 1033; 

 Cleve, Pl. f. the Ind. Ocean and the Malay Archipelago p. 1 9 ; C. Jacobi 

 Cleve, Phytoplankton p. 22, PI. 2, f. 18; Climacidium Fraunfeldii Van 

 Heurck, Synopsis PL 106, f. 5. 



2 (rr) — 3 (rr) — 7 (rr) — 10 (rr). 



Area: Tropical Atlantic Ocean, Red Sea, Indian Ocean, Malay Archipelago, 

 Pacific Ocean. 



Streptotheca Cleve. 



67. S. thamensis Cleve in Shmbsole, Journ. Quekett Microsc. Club, 

 1890, IV, n. s. p. 259, PL 13, f. 4-6; Phytoplankton p. 25, PL 2, f. 19; 

 Atl. Plankt. Organisms p. 353 ; Van Heurck, Treatise on the Diatomaceae 

 p. 463, f. 194; Ostenfeld & Schmidt, PL f. the Red Sea, etc. p. 161; 

 S. maxima Cleve, PL f. the Indian Ocean and the Malay Archip. p. 23 

 and p. 57, PL 8, f. 5. 



1 am unable to see any difference of specific value between the North 

 Sea species and the S. maxima described by Cleve from the Malay 

 Archipelago, but the details given by Cleve indicate the correctness of 

 Van Heurck in placing the genus in the neighbourhood of Climacodium 

 and Eucampia. 



2 Or) - 3(+) - 4(rr) - 6 (rr). 



Area: Along the coasts of West Europe, N. Atlantic Ocean (rare), Red 

 Sea, Malay Archipelago. 



Ditylium Bail. 



68. D. Sol (Van Heurck) Leuduger-Fortmorel, I c. p. 39 ; De Toni, 

 Sylloge Algarum, Vol. II, p. 1018; Cleve, Atl. Plankt. Organisms p. 325; 

 PL f. the Indian Ocean and the Malay Archip. p. 21 ; Triceratium Sol 

 Van Heurck, Synopsis PL 115, f . 1 (1881); A. Schmidt, Atlas d. Diatom. 

 Kunde PL 152, f. 4, 5, 7-9. 



