Fig. 161. — Diatom Ooze. (After Chun, from " KrOmmel's 

 oceanographie," by permission of j. engelhorn's ver- 

 lag in Stuttgart.) 



1-5, Coscinodiscus ; 6, Asteromphalus ; 7, Fragilaria antarctica ; 

 8, 9, Synedra ; io, Rhizosolenia ; 11, Chaetoceras ; 12, Navi- 

 cula (?) ; 13, Dictyocha ; 14, a broken Radiolarian. 



Fig. 162. — Dead Shells of Globigerina, the Spines of which 

 have been dissolved in their fall to the bottom 

 ("Challenger"). 



