DIATOMEAB. 627 



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

 gloia erythraea Grun. is common but quite variable in size, outline and the 

 inequality of the loculi. Mastogloia splencHda (Greg.) Cleve occurs in all 

 localities. Podocystis adriatica Kiitz. is abundant on Antithamnion. Clima- 

 cosphenia moniligera. Ehrenb. is also noticeable, while Grammatophora flexuosa 

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

 form, Siriatella delieatula (Kiitz.) Grun., not heretofore recorded from this 

 locality, is abundant on Folysiphonia. One specimen of Plagio gramma laiuense 

 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. 



BIDDX7LPHIA S. F. Gray, em. Van Heurck. 

 Biddulphia Pentacrinus (Ehrenb.) Boyer. Eare. 



ANAULUS Ehrenb., em. Van Heurck. 

 Anaulus minutus Grun. Eare. 



GRAIMMATOPHOEA Ehrenb. 

 Grammatophora flexudsa Grun. Common. 



STRIATEIiIiA Ag., em. Heiberg. 

 Striatella delieatula (Kiitz.) Grun. Local. 



LICMOPHORA Ag. em. Eoper. 

 Licmophora dalmatica (Kiitz.) Grun. Local. 



CLIMAOOSPHENXA Ehrenb. 

 Climacosphenia moniligera Ehrenb. Common. 



PLAGIOGRAMMA Grev. 



Plagiogramma inaectu^le Grev. Eare. 

 Plagiogramma labuense Cleve. Eare. 

 Plagiogramma lyratum Grev. Not common. 

 Plagiogramma obfesum Grev. Not common. 

 Plagiogramma pulchellum Grev. Not common. 

 Plagiogramma pygm§ieum Grev. Not common. 



TRACirySPHENIA P. Petit. 

 Trachysphenia australis P. Petit. Eare. 



CYMATOSIEA Grun. 

 Cymatosira Lorenziana Grun. Occasional. 



GLYPHODBSMIS Grev. 

 Glyphodesmis eximia Grev. Eare. 



