MARINE DIATOMS OF THE PHILIPPINE ISLANDS 14# 



Genus STICTODISCUS Greville 



STICTODISCUS AFFINIS Castracane 



(Castracane, Chall. Exp., p. 119, pi. 1, figs. 4, 6.) 



This seems to be a Philippine Islands form, its type having come 

 from Zebu. It would be possible to classify it as a wide variety of 

 the variable S. californicus Greville. 



STICTODISCUS ARGUS A. Schmidt 



(Schmidt, Atlas, pi. 74, fig. 12.) 



STICTODISCUS BICORONATUS Castracane 



See Trigonium bicoronatum (Castracane) Mann. 



STICTODISCUS CALIFORNICUS Greville 



Plate 33, fig. 1 

 (Micro. Journ., 1861, p. 79, pi. 10. fig. 1; Schmidt, Atlas, pi. 74, figs. 4-5.) 

 Recorded by De Toni only in fossil deposits, but it is rather fre- 

 quent along the Pacific coast and the Hawaiian Islands. Very vari- 

 able. The original type form and several varieties are common in 

 the Philippine Islands. An interesting monstrosity which probably 

 belongs to this species is here illustrated. 



STICTODISCUS EULENSTEINII (Grunow) Castracane 



See Trigonium eulensteinii (Grunow) Mann. 



STICTODISCUS JAPONICUS Castracane 



(Castracane, Chall. Exp., p. 119, pi. 1, figs. 2, 4.) 



Like Castracane's S. afjinis, it is too close to S. californicus. 



STICTODISCUS KITTONIANUS Greville 



(Micro. Journ., 1861, pi. 10, fig. 2; Schmidt, Atlas, pi. 74, figs. 16-18.) 



STICTODISCUS MULTIFURCATUS Bergon, misnamed 



(Le Diat., 1890, p. 3, pi. 2, fig. 1.) 



This is S. nankoorensis Grunow in Reise Fregatta Novara, plate 

 1A, figure 23; but it is worth recording that the single specimen 

 found by me duplicates exactly the figure given above, the locality 

 of which is given only as " Soundings of the Challenger Expedition." 



STICTODISCUS MULTIPLEX Janisch 



See Trigonium multiplex (Janisch) Mann, 



STICTODISCUS NANKOORENSIS Grunow 



(Grunow, Reise F. Nov., pi. 1A, fig. 23.) 



The figure in Schmidt's Atlas (pi. 74, fig. 2) shows the nearness of 

 this to S. californicus, of which it is indeed generally made a variety. 

 I follow De Toni in listing it separately solely as a convenience in 

 identification, 



