6 Charles E. Bessey 



Order Mucorales. Typically non aquatic ; saprophytic or para- 

 sitic on other fungi ; not producing zoospores, but spores in 

 sporangia, or singly, or in chains. 



Family 13. Mucoraceae. Black Molds. Sporangia with a 

 columella. Rhizopus, Miicor, Pilobolus. (Pf. I, i, 123.) 



Family 14. Mortierellaceae. Sporangia without a columella. 

 Mortierella. (Pf. I, i, 130.) 



Family 15. Chaetocladiaceae. Spores single, or more or less 

 clustered on much branched conidiophores. Chaetocladium. (Pf. 

 1,1,131.) 



Family 16. Piptocephalidaceae. Spores in chains, clustered on 

 the ends of branches. PiptocephaJis, Syncephalis. (Pf. I, i, 132.) 



Order Entomophthorales. Non aquatic ; mostly parasitic in 

 the bodies of insects, not producing zoospores. 



Family 17. Entomophthoraceae. With the characters of the 

 order. Entomophthora. (Pf. I, i, 134.) 



Class 9. BRYOPSIDOIDEAE. Higher Tube Algae. Plants 

 globular to stipitate, or dendroid, septate or continuous. (About 

 460 species.) 



Order Valoniales. Globular, mostly terrestrial coenocytes, to 

 compound septate marine plants ; isogamic. 



Family 18. Botrydiaceae. Little Bladder Algae. Minute 

 globular or ovoid, mostly terrestrial plants chlorophyll-bearing. 

 Botrydhim, Protosiphon. (Pf. I, 2, 123.) 



Family 19. Chytridiaceae. Minute globular or ovoid colorless 

 plants, mostly epiphytic. Rhisidium, Chytridium. (Pf. I, i, 64.) 



Family 20. Valoniaceae. Large Bladder Algae. Plants fila- 

 mentous and non-septate when young, basally attached by rhizoids, 

 usually becoming septate and branched, and often compound when 

 mature, the segments coenocytic. Valonia, Striwea, Halicysfis. 

 (Pf. I. 2, 145.) 



Order Dasycladales. Non-septate, regularly branched marine 

 plants ; isogamic. 



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