174 Prof. Ehrenberg on Microscopic Life 



ceous organism, Hemiaulus antarcticus predominated. The larger 

 bottle of the second mass had allowed the greater part to leak 

 through the sealed cork, so that only about a quarter remained. 

 The mass of sediment arrived in Berlin in May 1844, almost all 

 in such a condition, that the author had no hesitation in con- 

 sidering them still alive, although they all belonged to the almost 

 or perfectly motionless forms. The Fragilarias predominated 

 (F. pinnulata) ; these, though rarely adherent in chains, had their 

 green ovaries mostly preserved in a distinct natural disposition : 

 Coscinodisci and Hemiaulus also often exhibited groups of green 

 granules in their interior. No movement. 



The following numbers were sent over dried : — 



3. Sea-bottom drawn up by the lead from 190 fathom depth, 

 in 78° W S. lat., 162° W. long. 



A. SILICEOUS POLYGASTRICA. 



4. From snow and ice taken from the sea in 76° S. lat., 165° 

 W. long., near Victoria Land. 



SILICEOUS POLYGASTRICA. 



1. Coscinodiscus lineatus. 4. Fragilaria pinnulata. 



2. — Luna. 5. — rotundata. 



3. — subtilis. 6. — al. sp. 



The chief mass was densely crowded with Fragilaria pinnulata 

 and with Coscinodiscus, which on softening in water generally 

 exhibited their green ovaries, perhaps originally brown. 



