D mi à 
ng. V. 
din Peri 
Falklands, 616.1 CRYPTOGAMIA ANTARCTICA. 213 
6. Dicryocna Ornamentum, Ehrb.; 7. c. Feb. 1844. 
Has. Victoria Barrier; in Pancake Ice. In a floating scum, Lat. 64° S., Long. 160° W. 
Tertiary deposits of Sicily contain this species. 
7. Dicryocua septenaria, Ehrb.; 2. c. 
Has. Victoria Barrier; in Pancake Ice, and in mud from 190 fathoms. 
Previously found fossil in the tertiary deposits of Oran. 
8. Drorvocma Speculum, Ehrb.; Kute. Kiesel. Bacill. p. 140. t. 21. f. 22. c. 
Haz. Victoria Barrier; in Pancake Ice, and in mud at 190 fathoms. In the stomachs of Salpe, 
Lat. 66° S., Long. 157° W. In a floating scum, Lat. 64° S., Long. 160° W. 
A widely distributed species, found living in the North Sea and Atlantic, fossil at North Africa, Greece, and 
Sicily, and in Maryland, U.S. 
46. RHIZOSOLENIA, ۰ 
1. RuizosoLENIA Calyptra, n. sp., Ehrb.; Schrift. Berl. Akad. May, 1844. 
Has. Victoria Barrier; in Pancake Ice. Graham’s Land; Gulf of Erebus and Terror, in mud from 
270 fathoms. 
2. RuizosonENIA Ornithoglossa, n. sp., Ehrb.; Z. c. 
Has. Victoria Barrier; in Pancake Ice, and in mud from 190 fathoms. Graham's Land; Gulf of 
Erebus and Terror, in mud at 270 fathoms. 
Both these species have recently been detected in the Bermuda Islands. 
LVII. DESMIDIEA!, auct. recent. 
1. ARTHRODESMUS, Zi. 
1. AnrHRODESMUS Tenia, Ehrb.; Schrift. Berl. Akad. June, 1841. 
Has. Falkland Islands; on marine Conferve: Lesson. 
LVIII. LICHENES,* ZL. 
1. USNEA, Ach. 
1. Usnua melaxantha, Ach.; Lich. Univ. p. 618. Syn. Meth. p.303. Brown, Plant. Spitz. in Scoresby 
Voy. vol.i. App. p. 76. Kunth. Synops. vol.i. p. 36. D’Urv. in Mém. Soc. Linn. Paris, vol. iv. p. 596. 
* Since the publication of the “ Lichenes Antarctici” in the ‘ London Journal of Botany,’ and of those contained 
in the first part of this work, I have had the advantage of re-studying all the species with my friend, the Rev. Churchill 
Babington, whose profound knowledge of the forms of this difficult order, and acquaintance with the most recent 
writings of European Lichenologists, have been most liberally brought to bear upon this part of the ‘Flora Antarctica.’ 
