1919] Setchcll-Gardner : Myxophyceae 75 



no. 2238a. of tlie Phycotheca Boreali-Americana. The epiphyte is 

 rather sparsely represented on our material of Rhizoclonmm. The 

 identification was made after the distribution of the Rhizoclonium 

 and hence is not certainly known to be represented in all of the speci- 

 mens of the distribution. 



The specific name, cpipJujtica, having already been occupied by 

 Hieronymus (1898, p. 67) to designate a small, unique species coiling 

 around the filaments of larger Myxophyceae, it became necessary to 

 rename the species of the Leihleinia type found later by Wille, and 

 the species was consequently dedicated to him. 



Subgenus 2. Eulyngbya Gomont 



Filaments intertwined into a floccose or woolly expanded mass or 

 tufted with attached base, or even floating free ; sheaths, as they 

 become older, often thick and lamellate, at times j'ellowisli brown; 

 trichomes sometimes attenuate at the apices; marine, fresh water or 

 thermal species, found on rocks, but very rarely epiphytic. 



Gomont, Essai Class. Nost. Hom., 1890, p. 354. 



4. L. aestuarii (Mert.) Liebm. 



5. L. confcrvoides Ag. 



6. L. semiplena (Ag.) J. Ag, 



4. Lyngbya aestuarii (IMert.) Liebm. 



Filaments forming dense, dark olive green or blue-green strata on 

 mud, or more or less floccose floating masses, elongated, very flexuous, 

 densely interwoven, occasionally false-branched ; sheath at first hyaline, 

 thin, smooth, increasing in thickness with age, becoming rough, lamel- 

 late, or of yellowish or brownish color; trichomes blue-green or olive 

 green, not constricted at the dissepiments; apices slightly attenuate, 

 capitate, with slightly thickened end wall, rarely subacute, conical, 

 8-24/i diam., length of cells up to six times shorter than the diameter, 

 2.7-5.6/A long; protoplasm finely granular, usually with a laj-er of 

 granules at the cross walls. 



Floating in lagoons and pools of salt and brackish water, probably 

 along the entire coast from Puget Sound southward. 



Liebman, Bemark. tilliig danske Algenflora, 1841, p. 492. Co-n- 

 ferva aestuarii Mertens, in Jiirgens, Algae aquaticae. Decas II, no. 8, 

 1816 {fide Gomont). 



