Literature 



153 



Class Chsetophorales (Confervales). 



Families : Ulvacese ; Ulotrichaceae ; Blastosporaceae ; Chsetophoracete ; Chroo- 

 lepidacete ; Wittrockiellacea; ; Chsetopeltidaceaj ; Aphanochsetaceae ; 

 Coleocha3tacese ; Cylindrocapsacese ; (Edogoniacese. 



Class Siphonocladiales. 



Families : Valoniacese ; Oladophoracese ; Dasycladacese ; Sphseropleaceaa. 



Class Siphonales. 



Families : Bryopsidaceae ; Caulerpaceas ; Derbesiacese ; Codia,ceaj ; Vaucheri- 

 acese ; Phyllosiphonacese. 



Conjugate. 



Families : Desmidiace* ; Zygnernataceae ; Mesocarpacese. 



In the present volume the general principles originally expounded by 

 the Swedish algologists are maintained, except for certain differences necessi- 

 tated by recent discoveries. The classification here set forth differs con- 

 siderably in detail from those just reviewed and is based, first, upon the 

 immense amount of recent work on the Green Alga?, and, secondly, upon 

 the author's wide experience of these plants from many parts of the world. 

 Throughout the whole arrangement it has been necessary to keep constantly 

 in mind the tendency of so many modern investigators to give rather too 

 much emphasis to recently discovered characters, many of which are often 

 but of secondary or even of trivial importance. 



The details of the classification will be allowed to untold themselves 

 gradually, but four primary divisions of the Chlorophyceae are recognized 

 as fundamental. 



CHLOROPHYCE.E 



Division I. Isokontse. 



II. Akonta?. 



III. Stephanokonta*. 



IV. Heterokontse. 



LITERATURE CITED 



ACTON, E. ('09). Botrydina vulgaris, Bre"bisson, a primitive Lichen. Ann. Bot. xxiii, 1909. 

 ALLEN, C. E. ('05). Die Keimung der Zygote bei Coleochrete. Ber. Deutsch. Botan. Ges. 



xxiii, 1905. 



ALSBERG, C. L. ('12). A Discussion of the Probable Food Value of Marine Alga-. 



pp. 263270 in the 'Fertilizer Resources of the United States.' Washington, 1912. 

 ARCHER, W. ('62) in Quart. Journ. Micr. Sci. new ser. ii, 1862. 

 BEIJERINCK, M. W. ('90). Kulturversuche mit Zoochlorellen, Lichengonidien und anderen 



niederen Algen. Botan. Zeit. xlviii, 1890. 

 BEIJERINCK, M. W. ('93). Bericht iiber meine Kulturen niederer Algen auf Xahrgelatine. 



Centralbl. fur Bakteriol. xiii, 1893. 



