MARINE DIATOMS OF THE PHILIPPINE ISLANDS 55 



CAMPYLODISCUS RIVALIS A. Schmidt 



(Schmidt, Atlas, pi. 8, figs. 1-2; Deby, Campy., pi. 2, fig. 17.) 

 CAMPYLODISCUS ROBERTSIANUS Greville 



(Micro. Journ., 1863, pi. 1, fig. 5; Schmidt, Atlas, pi. 17, figs. 8-10; Deby, 

 Campy., pi. 3, fig. 32.) 



I give this name, the type specimen of which came from Queens- 

 land and specimens of which are recorded from the Philippine Islands 

 by Deby; but there is doubt if it can be held distinct from C. diplo- 

 stictus Norman. I found it to be quite frequent in several dredgings. 



CAMPYLODISCUS SAMOENSIS Grunow 



See under C. incertus A. Schmidt. 



CAMPYLODISCUS TAENIATUS A. Schmidt 



(Schmidt, Atlas, pi. 16, fig 2; pi. 51, fig. 1; Deby, Campy., pi. 7, fig. 41.) 

 I have found this also at Hilo Hilo, Hawaii. 



CAMPYLODISCUS TRIUMPHANS A. Schmidt 



(Schmidt, Atlas, pi. 15, figs. 4-5.) 



This is another strictly Campeche Bay, Philippine Islands, species. 



CAMPYLODISCUS WALLICHIANUS Greville 



(Micro. Journ., 1863, pi. 1, fig. 14; Schmidt, Atlas, pi. 14, figs. 15-16; pi. 17, 

 figs. 13-14.) 



Genus CAMPYLONEIS Grunow 



CAMPYLONEIS GREVFLLEI (W. Smith) Grunow 



(Van Heurck, Treat., p. 285, fig. 64; Van Heurck, Synopsis, pi. 28, figs. 8-16.) 

 Including the two varietal forms, C. argus and C. regalis. 



Genus CESTODISCUS Greville 



CESTODISCUS CINNAMOMEUS Grunow 



See Trigonium cinnamomeum (Greville) Mann. 



Genus CHAETOCEROS Ehrenberg (characters emended) 



Although there can be no doubt that Shadbolt's Bacteriastrum 

 must be recognized as a circular and otherwise slightly modified 

 variation of this unique genus, so that a distinction of generic value 

 can not be discovered for their separation, it is also doubtless true 

 that Bacteriastrum is a very convenient subgeneric term. As in my 

 Diatoms of the Albatross Voyages, I here follow the opinion of 

 Van Heurck, De Toni, etc., but add "Bacteriastrum" in brackets to 

 the circular forms here recorded, as an aid to identification. 



