Cruoria pellita (Lyngb.) Fries., Kjellm., The Algæ of the Arctic Sea 

 p. 142. 



In the literal zone. 



SW. I cel. Njarôvîk (G. O.). 



Peyssonellia Rosenvingii Schmitz in Rosenv., Gr]. Havalg. p. 782 ; 

 Hæmatostagon balanicola Strömf., Algveg. p. 25(?). 



On the fibers of Laminaria hyperborea, different shells, and stones 

 to a depth of c. 15 fathoms. Collected in April— Sept., only sterile. 



The Icelandic specimens closely resemble the Greenlandic specimens 

 of P. Rosenvingii, and although the Icelandic plants are sterile, I refer 

 them withouth hesitation to this species. 



The Hæmatostagon balanicola is described by Strömfeit (1887) 

 as novi generis nova species: his description is founded on young and 

 sterile specimens collected in Skagafjöröur in N. Icel. He shows in the 

 description that this new genus is closely related to the genus Peyssonellia, 

 but differing from it by the absence of the radicles. 



Strömfelt's description is too defective, but later it has been com- 

 pleted by M. Foslie 1 ) and Fr. Schmitz-), who have both had op- 

 portunity to examine Strömfelt's original specimens. They both found that 

 Strömfeit had not noticed the radicles, and consequently they identify the 

 genus Hæmatostagon with the genus Peyssonellia. 



Foslie identifies (1894, 1. c.) the H. balanicola Strömf. with the P. 

 Rosenvingii Schmitz (described in 1893), but in the same year (1894), 

 somewhat later, Fr. Schmitz (1. c.) in his answer to M. Foslie, mentions 

 the H. balanicola. In the year 1887 he had received an original speci- 

 men of this plant from Strömfeit. Having examined it, he found that it 

 was furnished with radicles, and consequently he thought he could identify 

 Hæmatostagon with Peyssonellia :i ) ; this he communicated to Strömfeit 

 and received his consenting answer in a letter of 1. March 1887. Schmitz 

 did not admit that H. balanicola was identical with P. Rosenvingii. „iZ. 

 balanicola Strömf. u , he says, „ist eine ganz unbestimmbare Squamariacee. 

 .... Es handelt sich hier um jugendliche Exemplare einer Alge, die jungen 



1 ) M. Foslie: New or critical Norwegian Algæ. Det kongelige Norske Viden- 

 skabers Selskabs Skrifter 1893. Throndhjem 1894. 



2 ) Fr. Schmitz: Kleinere Beiträge zur Kenntniss der Florideen. La Nuova 

 Notarisia 1894. 



3 ) In Fr. Schmitz: Systematische Uebersicht der bisher bekannten Gattungen 

 der Florideen, in Flora oder allg. bot. Zeitung 1899 and in Engler und 

 Prantl: Die natürlichen Pflanzenfamilien the genus Hæmatostagon is men- 

 tioned as identical with the genus Gruoriella. 



