C. Calcareous-shelled Polythalamia.
- Grammostomum divergens.
- Rotalia antarctica.
- Rotalia Erebi.
- Spiroloculina
Several forms of the genus coscinodiscus have been recognised with their green ovaries, and must certainly therefore have been collected in a living state.
2. Deposit from melted ice while the ships were sailing through broad strips of brown pancake ice.
(Materials from 75 S. latitude, 170 W. longitude.)
A. Siliceous-shelled Polygastrica.
- Asteromphalus Buchii.
- Rossii.
- Coscinodiscus lineatus.
- lunæ.
- oculus Iridis.
- radiolatus.
- subtilis.
- Dictyochia aculeata.
- Eunotia gibberula.
- Fragilaria acuta.
- pinnulata.
- rotundata.
- Hemiaulus antarcticus.
- Hemizoster tubulosus.
B. Siliceous-earthy Phytolitharia.
15. Spongolithis fustis? Fragment.
These and the preceding mass were sent over in water in the same sealed glass vessels in which they were collected in 1842. Hemiaulus antarcticus was the prevailing form found in the first smaller bottle, which has a rich sediment, almost all the separate atoms of which are independent siliceous-shelled creatures. The larger bottle was only about a quarter full, the larger portion having exuded through the sealed cork: almost the whole of the mass of sediment arrived in Berlin in 1844 in a state which I do not hesitate to call a living state, though all were forms having little or no motion. The Fragilarias predominated (Fragilaria pinnulata); these, though rarely hanging together in the form of a chain, still preserved for the most part their green ovaries in the different natural arrangements. Coscinodisci and Hemiaulus also showed in many cases groups of grains still green in their inside. No motion.
The following Nos. were sent dry:—
