DIATOMEAE. 627 



rart'. and Mastogloia rimosa Cleve, which is common in one locality. Masto- 

 gloia erytliraea Grun. is common but quite varialile in size, outline and the 

 inequality of the loculi. Mastogloia splcndida (Greg.) Cleve occurs iu all 

 loealities. Podocystis adriatica Kiitz. is ainindant on Antithamniun. Clima- 

 cosphenia moniUgera Ehrenb. is also noticeable, while Grammatophora flcxuosa 

 Grun is found in all gatherings, occurring pure on Centroccraa. The minute 

 form, Striatella delicatula (Kiitz.) Grun., not heretofore recorded from this 

 locality, is abundant on Polysiphoiiia. One specimen of Plagiogramma labucnse 

 Cleve, a form peculiar to Borneo, although somewhat similar to Plagiogramma 

 caribaeum Cleve, has been found. 



The following list includes the greater number of the forms noticed but 

 there are probably many more as various algae appear to differ much in the 

 variety of diatoms found upon them. 



BIDDULPHIA S. F. Gray, em. Van Ileurck. 

 Biddulphia Pentacrinus (Ehrenb.) Boyer. Bare. 



ANAULUS Ehrenb., em. Van Ileurck. 

 Anaulus mlnutus Grun. Rare. 



GRAMMATOPHORA Ehrenb. 

 Grammatophora flexuosa Grun. Common. 



STRIATELLA Ag., em. lleiberg. 

 Striatella delicatula (Kiitz.) Grun. Local. 



LICMOPHORA Ag. cm. Roper. 

 Licmophora dalmatica (Kiitz.) Grun. Local. 



CLIMACOSPHENIA Ehrenb. 

 Climacosphenia moniligera EhronV). Common. 



PLAGIOGRAMMA Grev. 



Plagiogramma inaequale Grev. Rare. 

 Plagiogramma labuense Cleve. Rare. 

 Plagiogramma lyratum Grev. Xot common. 

 Plagiogramma obesum Grev. Xot common. 

 Plagiogramma pulchellum Grev. Not common. 

 Plagiogramma pygmaeum Grev. Xot common. 



TRACHYSPHENIA P. Petit. 

 Trachysphenia australis P. Petit. Rare. 



CYMATOSIRA Grun. 

 Cymatosira Lorenziana Grun. Occasional. 



GLYPHODESMIS Grev. 

 Glyphodesmis eximia Grev. Rare. 



