in the Ocean at the South Pole, 



173 



29, Dlctyocha Speculum. 



41. Pyxidicula dentata. 



In several forms of the genus Coscinodiscus tlieii* green ovaries 

 were recognizable, consequently they must have been alive. 



2. Residue from melted ice, while the ship sailed through a 

 broad tract of bro^\^l pancake ice, in 74" to 78° south latitude. 

 (Materials from 75° S. lat., 170° W. long.) 



A. SILICEOUS POLYGASTRICA. 



B. SILICEOUS PHYTOLITHARIA. 

 15. Spongolithis Fustis? Fragm. 



These and the former specimens were sent over in bottles of 

 water. They were the same sealed bottles in which they were col- 

 lected in the year 1842. In the first little bottle, in which the 

 sediment was considerable, almost every atom being a distinct sili- 



