20G THE VOYAGE OF H.M.S. CHALLENGER. 



CEKAMIACE-E. 

 Ballia callitricha, Mont. 



Ballia callitricha, Mont. Syll. Gen. et Sp. Crypt., p. 444 ; Kiitz., Sp. Alg., p. 663 ; Dickie in Journ. 



Linn. Soc. Lond., xv. p. 43. 

 Sphacelaria callitricha, K. A. Agardh, Sp. Alg., ii. p. 23. 



Marion Island. Moseley. 



All round the Southern Ocean. 



" A bleached fragment of the same plant from a freshwater pool [on Marion Island], 

 accidentally conveyed by birds (?), had on it a minute Conferva and a Sphcerozyga, both 

 too imperfect for recognition." — Dickie. 



CHLOROSPERME^E. 



CONFEKVACEiE. 



Chroolepus aureum, Kiitz. 



Chrookpus aureum, Kiitz., Phyc. Gener., p. 284, et Sp. Alg., p. 426 ; Dickie in Journ. Linn. Soc. 

 Lond., xv. p. 43. 



Marion Island. Moseley. 



All over Europe, and in most of the islands of the Southern Ocean, New Zealand, &c. 



