APPENDIX. 385 



verse processes. Spores in one of parent- cells (or occa- 

 sionally in both). 



* Spiral band single. 



S. tenuissima. S. longata. S. inflata. S. communis. S. 

 quinina. 



* * Spirals two. 



S. decemina. S. elongata. 



* * * Spirals numerous. 



S. nitida. S. maxima. S. bellis. S. pellucida. S. rivu- 

 laris. S. curvaia. 



3. Zygogonium. Filaments simple or slightly branched ; 

 contents diffused or in two transverse bands. Conjugate 

 by transverse processes. Spores globose, in cross branches, 

 or in blind lateral pouches without conjugation. Z. 

 ericetorum. 



4. Mesocarpus. Filaments simple, with contents dif- 

 fused. Conjugate by transverse processes, from which the 

 filaments become recurved. Spores in cross branches. 



J/. scalaris. M. depress us. 



5. Staurocarpus. Filaments simple, contents diffused 

 (rarely in moniliform lines). Conjugate by transverse pro- 

 cesses, from which the filaments become recurved. Spores 

 (or sporanges) square or cruciate in dilated cross branches. 



5. glutinosus. S. cczrulescens. S. quadratus. S. virescens. 

 S. gradllimus. S. gracilis. 



6. Mougeotia. Filaments simple, soon bent at intervals ; 

 contents mostly diffused, sometimes in several serpentine 

 lines. Conjugate by the inosculation of filaments at the 

 convexity of the angles. Spores not known. M. genuflexa. 



6. (EDOGONIACEJE. Simple or branched, fresh-water 

 filamentous plants, attached, without gelatin. Cell-con- 

 tents uniform, dense. Cell-division accompanied by cir- 

 cumcissile dehiscence of parent-cell, producing rings on 

 the filaments. Reproduction by zoospores from contents 

 of a cell, with a crown of cilia ; resting spores in sporan- 



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