— 25 



■1 Ir) — 3(c) - 5 (it) — 6 (it) — 7 (rr). 

 Area: Atlantic Ocean at 10° N. 53° W. 

 Malay Archipelago, China Sea. 



Gulf of Bengal, 



Biddulphia Gray. 



69. B. chinensis Grev., Trans. Microsc. Soc. 1866, 

 p. 81, Pi. 9, f. 16; Leuduger-Fortmorel, 1. c. p. 39; Cleve, 

 Diat. f. the Sea of Java 1873, p. 6; Ostenfeld & Schmidt, 

 PI. f. the Red Sea, etc. p. 152, f . 6 ; A. Schmidt, Atlas der 

 Diat. Kunde Pl. 122, f. 22-24. 



1 have given figures of this species and of the following 

 showing the different direction of the processes and the 

 spines. 



3(+) - 5 (it) - 10 (it). 

 ' Area: Red Sea, Malay Archipelago, South China Sea. 



70. B. mobilensis Bail., Am. Journ. Sc. 1845, p. 336, 

 PI. 4, f. 24; Van Heurck, Synopsis PI. 101, f. 4, PI. 103, 

 f. A ; Cleve, Atlant. Plankt. Organisms, p. 288 ; Schröder, 

 Neapel p. 30; B. Bailey i Smith, Brit. Diat. II, p. 50, 

 PI. 45, f. 322, PI. 62, f. 322; Leuduger-Fortmorel, 1. c. 

 p. 38; Denticella mobiliensis Grim., de Wildeman, 1. c. 

 p. 127. 



2 (r) - 3 (rr) — 4 (rr) — 5 (rr) - 6 (rr). 



Area: Along the Coasts of West-Europe and North- 

 America, Mediterranean, Indian Ocean, Malay Archipelago, 

 Pacific Ocean. Neritic species. 



Gerataulina Perag. 



71. C. Bergonii Perag., Monogr. du genre Rhizoso- 

 lenia, Le Diatomiste vol.1, p. 103, Pl. 1, f. 15, 16; Schrö- 

 der, Neapel p. 30 (var. elongata) ; Cleve, Bih. t. Sv. Vet. 

 Akad. Handl. Bd. 20, 3, 1894, No. 2, p. 11, Pl. 1, f. 6; 

 Atl. Plankt. Organisms p. 288, PI. f. the Red Sea, p. 1032; 

 Ostenfeld & Schmidt, PI. f. the Red Sea, etc. p. 152; 

 Zygoceros (?) pelagicum Cleve, Kanonbaaden „Hauch" s 

 Togter, Kjöbenhavn (1889), p. 54. 



6(rr) — 10 (rr). 



Area: Temperate N.Atlantic Ocean, Mediterranean, Red Sea, Gulf of Aden 



n 



Fig. 21. 



Biddulphia 

 ihinensis Grev, 



(«5). 



Fig. 22. 

 Biddulphia 

 mobilensis Bail. 



72. C. compacta Ostf. in Ostenfeld & Schmidt, PI. f. the Red Sea, 

 1901, p. 153, f . 7 ; Bhizosolenia (Guinar dia?) recta Cleve, Pl. f. the Indian 

 Ocean and the Malay Archipelago 1902, p. 23 and p. 57, Pl. VIII, f. 7 a, b. 



