24 



CLEVE, PLANKTON FROM THE INDIAN OCEAN AND THE MALAY ARCHIPELAGO. 



Striatella Lindigiana Grun. Malay Archip., September, r. {t. 28,4; s. 32, 02). 



Thalassiosira antarctica Comber. S. Indian Ocean, 45° S. 26° — 34° E., r. (t. G,4 to 

 6,s; s. 34,07 to 34, 12). 



Thalassiosira Åuriyillii Cl., n. sp. Malay Archip., Semau Sound, July, rr. 



Thalassiothrix longissima Cl. & Grun. S. Indian Ocean, from 4.5° S. 22° E. to 



41° S. 80° E., not rare and of ordinary size {t. 8,6, mean of 12 obs. max. 14, min. 6,4; 

 s. 34,30, max. 35,25, min. 33 93); from 36° S. 89° E. to 32° S. 91° E., narrow forms not 

 rare (f. 19,9 mean of 4 obs. max. 35,75, min. 35,32; s. 35, eo, max. 35,75, min. 35,32). 

 Malay Archip., June, July, rr., but alive (t. 25,7 to 28,35; s. 33, oe to 33, so). 



Tropidoneis antarctica Castr. S. Indian Ocean, from 45° S. 22° E. to 43° S. 57° E. 

 as a rule rare {t. 7,2, mean of 8 obs. max. 9,6, min. 6,4; s. 34,08, max. 34,28, min. 33,92). 



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