6. GALLIONELLA.
1. Gallionella pileata, n. sp. Ehrb. I. c.
Hab. Victoria Barrier ; in Pancake-ice.
2. Gallionella sulcata, Ehrb., Schrift. Bert. Akad. April, 1837. Hab. Victoria Land; in Pancake-ice (doubtful). Graham's Land; in mud from 270 fathoms.
An Arctic plant, having been observed at Melville Island. Also in the open ocean off Rio de Janeiro. It inhabits Peruvian and African guano; has been found in the sand-hills of Patagonia, fossil in Bermudas, Sicily, Algiers, Maryland and Virginia, V. S. ; and in volcanic ashes from the Patagonian coast.
3. Gallionella Sol, n. sp. Ehrb.; Schrift. Bed. Akad. May, 1844.
Hab. Victoria Barrier ; in mud at 190 fathoms. Graham's Land; in mud from 207 and 270 fathoms.
4. Gallionella tympanum, n. sp., Ehrb. I. c.
Hab. Graham's Land; in mud from 207 fathoms.
5. Gallionella Oculus, n. sp., Ehrb. I. c.
Hab. Graham's Land; in mud from 270 fathoms.
7. CAMPYLODISCUS, Ehrb.
1. Campylodiscus Clgpeus, Ehrb. Kiitz. Kieselsch. Bacill. p. 59. t. 2. f. v. 1-6.
Hab. Graham's Land; in mud from 270 fathoms.
Pound fossil in Germany and Italy, in the Bermudas and in the Mastodon earth of the Plate river, in African guano, in the atmospheric dust near the Cape de Verd Islands, and in the volcanic tuff of the Rhine.
8. SUFJRELLA, Ehrb.
1. Sueikella (?) australis, Ehrb.; Schrift. Berl. Akad. I. c. Hab. Falkland Islands ; on marine Conferva, Lesson.
9. SYNEDEA, Ehrb.
1. Synedua Ulna, Ehrb.; Lifts, t, 17. f. 1. Kütz. I. c. p. 66. t. 30. Exilaria Ulna, Ilassall, Brit. Fresh-water Alg. p. 433. t. 97. f. 2.
Hab. Victoria Barrier; in Pancake-ice (doubtful). Graham's Land; in mud 270 fathoms.
One of the most abundant and easily recognized of the Diatomacea, not only in Europe but throughout the globe. Mr. Hassall states it to be of very frequent occurrence in fresh-water ponds and ditches of England. It is also found in Icelandic peat, in marine mud from Spitzbergen, in the uatural paper of Silesia, and in the Tropical Ocean off Rio. As a fossil or dead, it has occurred in Oran and Sicily, the United States, in alluvial deposits in Brazil, the Euphrates River, and in atmospheric dust off the Cape de Verd Islands. It is also found in the volcanic tuff of the Rhine and in Peruvian guano.
