Herposteiron 229 



Aphanochaete globosa Wolle, F. W. Alg. 1 1 9. pi. 105. f. 



j. 1887. Nordst Svensk. Vet. Akad. Hand. 22 8 : 15. 1 

 Hansg. Flora, 71: 216. 1888. DeToni, Syll. Alg. 1: 180. 

 1889. Saunders, Flora of Neb. I : 63.//. ry.f. 2. 1894. 



Not Nordstedtia globosa Borzi, Nuova Notarisia, 3 : 50. 1892, 



Cells 14-16 jut in diameter (12—18// Klebahn), loosely asso- 

 ciated, inclosed in a subglobose gelatinous mass 1 mm. or more in 

 diameter. 



" Massachusetts : Lake Quinsigamond " (G. E. Stone). 



" New Jersey : Hammonton " (F. Wolle). 



" Nebraska : Cherry county" (De Alton Saunders). 



We have seen no specimen of this species, but the descriptions 

 of Wolle and Saunders leave little room for doubt that they actually 

 collected it. 



The genus Nordstedtia Borzi was supposedly founded on 

 Aphanochaete globosa (Nordst.) Wolle, but Dr. Klebahn found by 

 comparison of original specimens of Nordstedt's species with draw- 

 ings of Nordstedtia furnished by Borzi, that the latter represented 

 an entirely different plant. 



IX. HERPOSTEIRON Nageli ; Kiitz. Spec. Alg. 424. 1849 



Aphanochaete A. Braun, Betracht. iiber Erschein. Verjung. 

 196. 185 1. Huber, Ann. Sci. Nat. Bot. VII. 16: 278-290. 1892. 



Thallus microscopic, composed of simple or irregularly 

 branched, creeping filaments. Cells bearing on the dorsal or ex- 

 posed surface one or more elongated, hyaline, inarticulate bristles, 

 which are inflated or bulb-like at the base but not sheathed. 

 Chromatophore covering the cell-wall more or less completely, 

 inclosing one or more pyrenoids. 



Asexual reproduction by means of 4-ciliate zoospores gener- 

 ally furnished with a red eye -spot, 1-4 produced in a cell. 



Sexual reproduction by conjugation of a large female, and 

 much smaller male gamete, both 4-ciliate. 



Inhabitants of fresh water. Type, H. confervicola Nag. [Etym. 

 ipTzco, to creep, and aretpo^, rigid.] 



The researches of Huber and Klebahn leave no room for 

 doubt that the two types, Herposteiron confervicola Nag. and 

 Aphanochaete repens A. Braun, are the same plant. These two 

 investigators, however, reject the earlier name proposed by Nageli, 



