406 
Notes. 
fervicola, Nag., (3) polychaete , Hansg. The genus Aphanochaete, 
Berth, non A. Br.; included: (1) repens , Berth, non Br., (2 ) globosa, 
Nordst. (Herp. globosa , Nordst.), (3) vermiculoides, Wolle, (4) poly- 
tricha , Nordst; 
Although De Toni 1 and Wille 2 , to some extent, adopted this system 
of Hansgirg’s, it was soon to be attacked by Mobius and Huber. The 
former 3 points out on p. 85 that Rabenhorst’s Fig. 114^ (loc. cit.) 
of Aphanochaete repens , Braun, although agreeing in other respects 
with Braun's description, seems to indicate that the hairs are not truly 
septate, but only contain a number of masses at definite distances 
from one another. Further on (p. 97) he describes the development 
and structure of the hairs in a species, which he takes to be Her- 
posteiron confervicola (A. Br.) Hansg. 4 He describes the development 
of a thin sheath round the base of the hair, and denies the presence 
of any articulations in the hairs of this species. According to 
Hansgirg, however, the presence of a sheath would preclude the 
possibility of the hair being articulated, for the species Mobius 
examined must then belong to the genus Aphanochaete , Berth., and 
not to Herposteiron at all. 
Huber 6 examined the original specimens of Herposteiron confervi- 
colum , Nag., H. repens (Br.) Wittr., and of Aphanochaete , Berth. He 
found that in all three the hairs were simple and unicellular, and 
showed that what Braun had taken for transverse walls in his 
Aphanochaete repens were really Only ‘ bouchons d’une mature 
r^fringente qui fait apparaitre le poil comme indistinctement articuM ’ 
(loc. cit., p. 327). I have been able to show the same for the species 
from Sheen Common, which I think may probably be identical with 
Herposteiron polychaete , Hansg. If the young hairs, which appear 
1 Sylloge Algarum, 1889, P* I 79 * 
2 Natiirl. Pilanzenfam. I. 2, pp. 94, 95. Quite recently West (Algal Flora of 
Yorkshire, 1901) also adopts this system. 
8 Morphologic der haarartigen Organe bei den Algen. Biologisches Centralbl., 
1892, vol. xii, pp. 85, 97. 
4 Hansgirg later (Flbra, 1888, p. 505) united Aphanochaete repens, Br. = 'll er po- 
st eir on repens (Br.) Wittr. with Herposteiron confervicola Nag. I do not quite 
understand what Mobius means by the two authors’ names he places after his 
species (cf. also Klebahn, loc. cit., p. 292). Mobius also examined Aphanochaete 
globosa, Nordst. (p. 104); in which he found a distinct sheath, as has been observed 
by other investigators. 
5 Observations sur la valeur morphologique et histologique des poils et des soies 
dans les Chdetophortes. Journal de Botanique; 1892. p. 325. 
