434 
Notes. 
to our knowledge of this interesting Fern, it seems to me worth while 
to correct the error contained in the sentence quoted. 
At the time of my investigations of the Hymenophyllaceae in 1889 
I excluded Loxsoma from my study because proper material was not 
then at my disposal, and also because I considered this genus as not 
included in the family. -I therefore refrained from making any 
reference to the structure of Loxsoma . In the sentence over which 
the author is troubled this is expressly stated as follows : — 
‘ Der Stamm der Hymenophyllaceen — ich nehme immer Loxsoma aus, 
welches seinem ganzen Aufbaue nach eine besondere Stellung ein- 
zunehmen scheint und von den Systematikern neuerdings auch von 
den Hymenophyllaceen getrennt wird — besitzt ein centrales, collateral 
oder concentrisch gebautes Gefassbiindel. Dasselbe ist umgeben/ &c. 
It is therefore evident that the author has inadvertently failed to 
grasp my expressed meaning, and has consequently misrepresented 
my position in this matter, which is precisely that of Prantl, of 
whom he says — ‘no mention is made at all of the anatomy of 
Loxsoma ! 
K. GIESENHAGEN. 
Munich, 
April 10, 1901. 
In my paper upon the anatomy of this Fern, published in the last 
number of the Annals, I made a reference to the work of Dr. Giesen- 
hagen on the Hymenophyllaceae, in which, I regret to say, I have, 
inadvertently, completely misrepresented his statements. At the time 
I was writing my article I was unfortunately unable to verify this 
particular reference, so the error was allowed to pass undetected. It 
is unnecessary to state how much I regret my mistake ; it only remains 
to offer my sincere apologies to Dr. Giesenhagen in the hope that 
the preceding correction will make clear, and at the same time 
entirely remove, the erroneous impression I have given of his results. 
D. T. GWYNNE-VAUGHAN. 
