230 Chaetophoraceae 



on the ground that his description is incomplete and even inac- 

 curate in certain respects. The identification of his plant with 

 that later described by Braun as Aphanochaete rcpcns rests upon 

 authentic drawings by Nageli, but as these were not published 

 with the description, the evidence furnished by them on a matter 

 of priority is not admitted by Klebahn and Huber. From an 

 American point of view, these original drawings, even though un- 

 published, furnish as valid evidence in regard to the character of 

 Nageli's species as would be furnished by specimens from his her- 

 barium. 



Furthermore, on the very ground upon which it is alleged that 

 Nageli's genus should be abandoned, there is even more reason 

 for rejecting Aphanochaete A. Braun. For in two important 

 points, namely, the description of the bristles as articulate and the 

 zoospores as biciliate, Braun's characterization is faulty. These 

 inaccuracies gave rise to the confusing and untenable arrangement 

 by Hansgirg ('88, '93) (which was unfortunately adopted by 

 DeToni and by Wille in Engler & Prantl) of the two genera, 

 Herposteiron (Nag.) Hansg. (Aphanochaete A. Br. non Berthold) and 

 Aphanochaete (Berthold) Hansg. non A. Br. 



The identity of the types of these two so-called genera is suf- 

 ficiently evident by a comparison of Nageli's drawings, published 

 by Huber, and Berthold's well-known figures. 



There is, then, no good reason why the name Herposteiron 

 confervicola Nag. should not be retained. 



1. Herposteiron confervicola Nageli; Kiitz. Spec. Alg. 424. 



1849. Hansg. Flora, 71 : 216. 1888 ; Phys. und Phyc. Unter- 



such. 243. 1889. Kirchn. Mik. Pflanz. 11. pi. 2. f.23. 1891. 



Huber, Ann. Sci. Nat. Bot. VII. 16 : 286. pi. p. f. 6, 7. 1892 



[fig. " apres Nageli"]. Saunders, Flora of Neb. 1: 63.pl. 



22. f. 1. 1894. Mobius, Abhand. Senckenb. Nat. Gesell. 18: 



322. //. 2. f. 1. 1894. 



Aphanochaete repens A. Br. Betracht. u. Erschein. Verjung. 

 196. 185 1. Rabenh. Flor. Eur. Alg. 3: 391./. 114. 1868. Wood, 

 Hist. F. W. Alg. 212. pi. 14. f. 5. 1873. Berthold, Nov. Act. 

 Acad. Leop. Car. 40 : 214. pi. 18. f. 2-j. 1878. Kirchn. Krypt. 

 Flor. Schles. 2 1 : 71. 1878. Cooke, Brit. F. W. Alg. 197. //. 80. 



