508 FLORA ANTARCTICA. [Fuegia, the 



8. Fragilaria constricta, Ehrb. Kiltz. I. c. p. 46. t. 29. f. 25, c. 

 Hab. Falkland Islands ; on marine Conferva, Lesson. 

 Found in the volcanic tuff of the Rhine, and in Mexico. 



!>. Fragilaria rhabclosoma, Ehrb. F. capreina, Kiitz. p. 45. t. 36. f. iii. 



Hab. Falkland Islands ; on marine Conferva, Lesson. 



A frequent inhabitant of pools and ditches in England, and many other parts of the world, including Asia, 

 Africa, America and the South Sea Islands. In the sand-hills of Patagonia, and in the volcanic tuff of the Rhine. 



10. Fragilaria Trachea, n. sp. Ehrb. Schrift. Berl. Mad. I. c. 

 Hab. Falkland Islands; on marine Conferva, Lesson. 



11. Fragilaria Ventriculus, n. sp. Ehrb. I. c. 

 Hab. Falkland Islands ; on marine Conferva, Lesson. 



3. MELOSEIRA, Ag. 



1. Meloseira n. sp. ? fibs moniliformibus tenuissime striatis pedunculo gelatinoso affixis, frustuhs per 

 paria coadimatis, junioribus sphsericis demum compressis, apicibus utrinque convexis. Thwaites, MS. 



Hab. Kerguelen's Land ; in the sea. 



M. fflo&iferce, Harv. simillima, sed frustulis adultioribus semper compressis differt. Fila striata ut in M.globifera. 

 Thwaites, MS. 



4. PYXLDICULA, Ehrb. 



1. Pyxidicula dentata, n. sp. Ehrb., Schrift. Berl. Akad. May, 1844. 

 Hab. Victoria Barrier ; in Pancake-ice. 



2. Pyxidicula Hellenica, Ehrb. I. c. 



Hab. Victoria Barrier ; in Pancake-ice. Graham's Land; in mud from 270 fathoms (doubtful as 

 to species). 



This has been found fossil in Bermuda, the iEgean Sea, and Maryland, U.S. 



3. Pyxidicula n. sp. ? Ehrb. I. c. 



Hab. Victoria Barrier; in mud from 190 fathoms. 



4. Pyxidicula sp. ? 



Hab. In the stomachs of Salpa, Lat. 66° S. Long. 157° W. 



5. HEMIZOSTER, n. g. Ehrb. 



1. Hemizoster twbidosus, Ehrb., Schrift. Berl. Akad. May, 1844. 

 Hab. Victoria Barrier and Land ; in Pancake-ice. 



