IV, — On the Classification and Geographical Distribution 

 OF THE Laminariace^. Bt William Albert Setchell. 



According to Bory de Saint Vincent,^ the name Ziarainarius was 

 first used by Roussel in his " Flore du Calvados " which was pub- 

 lished in 1796. Lamouroux was the first to use the name Laminaria 

 distinctively,^ and he was the first to separate the genus from the 

 old comprehensive genus Fucus. Bory established several new 

 genera/ and grouped them together under the name of JLaminariees^ 

 He included the genera Diirvilloea, Lessonia, Macrocystis^ Agarurriy 

 Laminaria, and Iridma as understood by him. He also established 

 two subgroups, the one comprising those forms with branched stipes, 

 the other to include the forms with simple stipes. 



Since Bory's publication there have been several revisions of the 

 Laminariacece and it will be best perhaps to consider these briefly 

 at this point. De la Pylaie, in the *' Flore de Terre Neuve,"^ gave 

 a systematic review of the kelps and created a number of new 

 genera, only one of which, viz : Saccorhiza, remains established. 

 In Decaisne's " Essais sur une classification des algues et des poly- 

 piers calcif^res de Lamouroux,"® the eight genera assigned to this 

 group are arranged in the following order: Laminaria^ Haligenia^ 

 Agarum, Capea, Alaria, EcMonia, Lesso7iia, and Macrocystis. In 

 this arrangement the nearly related genera are grouped together. 



Endlicher enumerates eleven genera in the "Genera Plantarum.'" 

 He does not group them together into subtribes, but arranges them 

 in the following order: Lessonia, Macrocystis, JSTereocystis, Ecklonia, 

 Laminaria, Capea, Saligenia, Alaria, Tlialassiophyllum, Agarum, 

 and Gostaria. The most noticeable feature of this arrangement is 

 the relative positions occupied by JEcMonia, Capea, and Alaria. 

 Neither Chorda [Scytosiphooi filum) nor Egregia {Phyllospora 

 Menziesii) are included in this group by Endlicher. 



In the same year (1843) Ktitzing published his " Phycologia Gene- 

 ralis" in which he proposed three new genera and divided the 

 family, as he called it, into three sections. In his " Species Alga- 



' Diet. Class. d'Hist. Nat., t. 9, p. 187, 1826. 



2 Essai, etc. in Ann. du Mus. d'Hist. Nat, t. 20, p. 41, 1813. 



3 Loc. cit. pp. 192-194. "^ Loc. cit., p. 191. M829. 



« Ann. Sci. Nat., ser. 2, t. 17, p. 330, 1842. '' Snppl. Ill, p. 26, 1843. 



Trans. Conn. Acad., Vol. IX. March, 1893. 



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