334 W. A. Setchell — Classification and Geographical 



rum,'" he retains these three sections and j^resents the following 

 arrangement :^ — 



" Sectio I. Laminariese genuinse; nee cribratse, nee caulescentes." 



1. Phlceorhiza. 2. Laminaria. 3. Hafgygia. 4. Saligenia. 

 5. Capea. 6. Alaria. 7. Costaria. 



'* Sectio it. Agarese ; stipitatse vel caulescentes, phyllomate gi- 

 ganteo cribratim et regulariter perforato." 



8. Agarum. 9. Thalassiopliyllum . 



" Sectio III. Macrocysteae ; caulescentes, foliosi ; folia ex divi- 

 sion! basilari phyllomatis oriunda." 



10. Lessonia. 11. Macrocystis. 12. Nereocystis. 13. Pinnaria. 



The first volume of J. G. Agardh's " Species Algarum " appeared 



in 1848. He included the genera Adenocystis, Hook, et Harv. and 



Scytosiphon, Endlich. (which at that time included not only Sc. 



Jilum, Ag., but also Sc. lomentariiis, J. Ag. and ^c. tomentosus^ J. 



Ag.). He divided the order (as he termed it) as follows: — 



'' f Soris totam frondem investientibus." 



1. Adenocystis. 2. Scytosiphon. 



" ff Soris maculas ambitu indefinitas efficientibus 



* Fronde ecostata, Integra aut vage fissa, terminali." 



3. Laminaria. 4. Saccorhiza.. 



«** Fronde ecostata circa stipitem spirali." 



5. Thalassiophyllum. 



*' *** Fronde costata." 



6. Costaria. 7. Agarum. 8. Alaria, 



ii **** Fronde pinnatifida." 



9. EcMo7iia. 



n ***** Fronde foliosa, foliis ambitu definitis." 



10. Nereocystis. 11. Lessonia. 12. Macrocystis. 



This is the latest classification of the Laminariaceae known to me. 

 Since then however, there have been several works which have 

 added not only to our knowledge of the morphology of the various 

 species, but also in regard to the affinities of the various genera. 



Leipsic, 1849. 2 cf, pp^ 513-584. 



