— 18 — 



d. Zool. Stat, zu Neapel Bd. 14, 1900, p. 27, Pl. I, f. 1 ; ?C. rude Leu- 

 duger-Fortmorel, I.e. p. 37, Pl. VI, f. 1. 



The chromatophore is solitary and in front. 



Rather common: 1(c) — 2(c) — 3 (r) — 4 (it) — 5 (it) — 6 ( + ) — 7 (r) 



Area: Tropical neritic form, noted from Atlantic Ocean, Mediterranean? 

 Red Sea, Indian Ocean, Malay Archipelago. 



49. C. javanicum Cleve, Diat. f. the Sea of Java 1873, p. 10, PI. 2, 

 f. 13; PI. f. the Indian Ocean and the Malay Archip. p. 19 and p. 55 ; 

 Leuduger-Fortmorel 1. c. p. 37. 



Fig. 14. Chaetoceras javanicum Gl. Chain in front view, cell in side view Cn^). 



This species is, as Cleve has lately 

 stated, nearly akin to C. Schüttii GL, if not 

 identical ; I have found some spores belonging 

 to this species and they are about as the 

 spores of C. Schüttii, both valves being spini- 

 ferous. It has one chromatophore in front; the 

 terminal awns are diverging at an acute angle 

 and thickened; the other awns are thin and 

 turn off towards the ends of the chains ; seen 

 from the valves they have a characteristic 

 curvature as shown in the ligure. 



Fig. 15. 



Chaetoceras javanicum Gl. 

 Chain with endospore in 

 front view (A|4). 



