Stephanopyxis Ehbg. 
Q. §. Palmeriana (Grev.) Grun., Diat. Franz Joseph Land p. 38; 
A. Schmidt, Atlas d. Diat. Kunde, Pl. 130, f.1, Pl. 123, f. 41 (f. javanica 
Grun.); Leuduger-Fortmorel, Diatomées de la Malaisie, Ann. du Jard. bot. 
de Buitenzorg, XI, 1893, p. 45; Otto Miller, Ber. Deutsch. Botan. Gesellsch. 
1901, Bd. 19, p.196, f.1. Creswellia Palmeriana Grev., Trans. Microsc. 
Soc. 1865, p.2, Pl. 1, f.9; Cleve, Diat. f. the Sea of Java, Bih. till K. 
Svenska Vet. Akad. Handl. Bd. 1, 11, 1873, p. 8. 
10 (rr). 
Area: Neritic species, found in the Malay Archipelago, South China Sea, 
Avafura Sea, Australia. 
Sceletonema Grev. 
3. §. costatum (Grev.) Cleve, Diat. of the Sea of Java, 1873, p.7: 
Leuduger-Fortmorel, ]. ¢. p. 47; Van Heurck, Synopsis Pl. 91, f. 4; de 
Wildeman, Prodrome de la flore algologique des Indes Néerlandaises, 1897, 
p. 180; Lemmermann, Planktonalgen, Ergebnisse einer Reise nach dem 
Pacific, Abh. Nat. Verein, Bremen, XVI, 2, 1899, p. 317 and 329; Cleve, 
Atl. Plankton Organisms, p. 351; A Treatise of Phytoplankton, Upsala, 
1897, p. 25; Pl. f. the Indian Ocean and the Malay Archipelago, p. 23, 
K. Sv. Vet. Akad. Handl. 35, No.5, 1901 [1909]. 
1(4) — 2(rr) — 6 (rr). 
Area: Baltic, North Sea, Coasts of British Isles, Ireland, Shetland to 
Westmannaé (South of Iceland). Gulf of Bengal, Malay Archipelago, Pearl Har- 
bour at Oahu (Sandwich Islands). Certainly a neritic species of the temperate 
and subtropical regions of all oceans. 
Coscinodiscus Ehbg. 
4. (. bengalensis Grun., Van Heurck, Synopsis, Pl. 132, f.9; Rattray, 
Coscinodiscus, Proc. Royal Soc. Edinburgh, vol. 16, 1888—89, p. 580; 
Cleve, Pl. f. the Ind. Ocean and the Malay Archip., p. 20. 
I refer a small form with radially arranged rows of very fine markings 
to this species. 
2(rr) — 3 (rr). 
Area: Gulf of Bengal, Malay Archipelago. 
5. ©. excentricus Ehbg., Abh. Berl. Akad. 1839, p. 146, Mikrogeo- 
logie tab. 18. f. 32, tab. 21, f. 6; Van Heurck, Synopsis, Pl. 130, f. 4, 7; 
Leuduger-Fortmorel, 1. c. p. 44; de Wildeman, 1. c. p.143; Cleve, Atl. 
Plankt. Organisms, p. 318; Pl. f. the S. Atlantic and the S. Indian Ocean, 
Ofv. af K. Sv. Vetensk. Férhandl. 1900, No. 8 [1901], p. 930; Pl. f. the 
Ind. Ocean and the Malay Archip., p. 20. 
