CLASSIFICATION OF TIIALLOPHTTES. 339 



ORDER III. BASIDIOSPORE^. 

 Sectiok 1. Hypodermic. 

 1. Uredinaeem. 3. Ustilaginacem. 



Section 2. Basidiomycetes. 



3. Tremellaeem. 4. Agaricacem (Hymenomycetes). 5. Lycoperdaeece 

 iOasteromycetes). 



ORDER IV. ASCOSPORB^. 



1. Tuberacem. 3. Onygenaem. 3. ErysipJuicm. 4. Sphmriacem (Py- 

 renomycetes). 5. Helmllacem. 6. Liclienes (excludino; CollemaceEe). 



ORDER V. TETRASPORE^ (FLORIDE^.) 

 1. Bangiacese. 3. Dictyotacese. 3. Ceramiacese. 4. Nemaliacese. 

 5. Lemaniacese. 6. Sphserococcaceae 7. Melobesiacese. 8. Rliodo- 

 melacese. 



ORDER VI. ZOOSPORES. 



1. Palmellacese. 3. Confervaceae. 3. Ectocarpese. 4. Sphacelari- 

 acese. 5. Sporochnacese. 6. Laminariacese. 



ORDER VII. OOSPORES. 

 Section 1. LbucosporejE. 

 1. OhytridiaceoB. 2. PeronosporacecB. 3. Saprolegniacem. 



Section 3. Chloeosporbc 



4. Volvocaceae. 5. SipUonacese. 6. Spliseropleacese. 7. (Edogoni- 

 acese. 8. CoIeochsetacesB. 



Section 3. PhcosporE/E. 

 9. Tilopteridese. 10. Pucacese. 



(8.) lo 1873 Fischer proposed an arrangement* of the Thallophytes 

 which in many respects is like that of Sachs. Like the latter, Fischer 

 divides the Thallopliyta (co-ordinate with Cormophyta) into four 

 classes, composed in each case of chlorophyll-bearing and chlorophyll- 

 free plants, the algse and fungi. Instead, however, of considering the 

 fungi as degraded forms, he regards them as constituting with the 

 algse two parallel but entirely distinct genetic lines. The Myxomy- 

 cetes he places in a third genetic line, nearest to, but still distinct from, 

 the fungi. 



* Given in Sachs' " Lehrbuch," fourth edition, p. 348. The groups 

 ;given under each class are of very unequal value. 



