338 BOTANY. 



3. Physortiycetes, including the Mucorini and Saprolegniae&E. 



3. Hyplwmyce'es, including Peronospoi'em, PeniciUium, and many 

 imperfect forma. 



4. Ooniomycetes, including JJredinece and Ustilaginem, and in addi- 

 tion a great number of imperfect stages of Ascomycetes. 



5. Gasteromycetes, as in tliis book, with tlie addition of Myxomy- 

 ceies. 



6. Hymenomycelea, as in tliis book, and including the Tremellini. 



De Bary* arranged Fungi under four groups, as follows : 



1. Phycomycetes. 



Saprolegni icem. Peronosporem. Mucorini. 



3. Hypodermiae. 



Uredinem. Ust laginem. 



3. Basidiomycetes. 



Tremellmi. Hymenomycetes. Oasteromycetes. 



4. Ascomycetep. 



Protomycetes. Tvberacece. Onygenem. Pyrenomyceles. Dis- 

 comycetes. 



In both the foregoing arrangements of Fungi the Lichens are omitted, 

 they being regarded as of a different nature. 



(7.) In 1873 Cohn publishedf an outline of a classification of the Cryp- 

 togams in which the old distinctious between Algse, Fungi, and Lich- 

 ens were abandoned. He considered the Tliallophytes as constituting 

 a single class, co-ordinate with Bryophyta, Pteridophyta, and Phanero- 

 gamia, and divided it into seven orders, and each of these into many 

 families ; the latter are in most cases equivalent to what are called 

 orders in this book. The families in Roman contain chlorophyll, those 

 in italica are chlorophyll-less. 



Class Thallophyta. 



ORDER L SCHIZOSPORE^. 



1. Schizomycetes. 3. ChroococcacesB. 3. Oscillatoriacese. 4. Nos- 

 tocaceae. 5. Rivulariaceae. 6. Scytonemacese, 



ORDER IL ZYGOSPOREiE. 

 1. Diatomacese. 3. Desmidiaceae. 3. Zygnemacese. 4. MucoracecB. 



* In Streinz : " Nomenclator Fungorum," 1861, p. 738, and also in 

 " Morphologie und Physiologie der Pilze, etc.," 1865, preface, p. 6. 



f Ferdinand Cohn, " Conspectus familiarum cryptogamarum secun- 

 dum inethodum naturalum dispositarum," in " Hedwigia," February 

 1873. 



