PLANKTON OF THE GULF OF MAINE 
3 
Section 2.— General survey of the plank- 
tonic plants, etc.— Continued. 
Diatoms— Continued. 
Notes on the dominant genera of 
diatoms 
Asterionella 
Biddulphia 
Chsetoceras 
Coscinodiscus 
Coscinosira 
Ditylium 
Eucampia 
Guinardia 
Lauderia 
Nitschia 
Rhizosolenia 
Skeletonema 
Thalassiosira 
Section 2. — General survey of the plank- Pa 2 0 
tonic plants, etc. — Continued. 
Diatoms — Continued. 
Notes on the dominant genera of 
diatoms — Continued. 
Thalassiothrix 454 
Other diatoms 457 
Notes on other unicellular plants and 
animals 458 
Phieocystis 458 
Halosphaera 459 
Acantharian radiolarians 460 
Tintinnids 463 
Other unicellular organisms 465 
Notes on the biology of the phytoplank- 
ton 465 
Bibliography. 487 
Page 
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449 
