134 "^'o^- XLTIT., Art, 1.— K. Yendo : 



not to be duo to the age of the plant, as they have been separa- 

 ble in the well developed and matured specimens. If we follow 

 Stkömfelt's view, the latter should be referred to A. ßagellaris. 



The material of the Atlantic forms of A/aria at my disposal 

 is limited in number and seems by no means to represent every 

 possible form. I think it, therefore, better to leave the point in 

 an unsettled state, for a future investigation by one who may 

 have material enough to command these forms. 



RosENVENGE^) determined three specimens from Greenland as 

 A. ßncicllaris Steömf. Some of these were sporophyll-bearing. 

 According to the measurements of tlie plants given by him, the 

 largest sporophyll was 40 cm. in length. He remarks : — " Cette 

 espèce paraît être très voisine de VA. P///(ui et de VA. grandi folia : 

 reste ;i rechercher, si elle en est bien distincte." This may be 

 Tinderstood as assuring that his specimens are not referrable to A. 

 esculenfa. JÖNSSOX mentions Rosenvencie's A. ßagellaris under A. 

 esciihnifa var. pinnata (GüNN.) Kjellm., though without stating the 

 reason for doing so. 



To the above discussion, the observations of Goodenough and 

 WooDWAED must be brought into consideration. In Turner's 

 Historia Fucorum, ^^ol. II, p. 120, it says : — " The excellent authors 

 of observation upon the British Fuci have, in the Linnean Trans- 

 actions, divided F. esculentus into two species, to which they have 

 given the names of F. teres and F. ietragonus and they have point- 

 ed out such striking characters of distinction l^etween them, that, 

 were these only permanent, there could be no question of their 

 being sufficient to establish priority of this separation . . . . " So 

 Turner related the unseparableness of two such forms. In my 

 opinion, what the two observers have mentioned as the distinc- 



1) EosENVEXGE : Deiix. Mem. Alg. Mar. Groenland, p. 50. 



