312 CORRESPONDENCE. 
To enter into its contents would be quite superfluous, since the only point of our 
controversy— the priority of discovery— has been conceded to me by Dr. Fox ; 
while the decision of the next question— concerning the nature of the growth 
—does not depend on Dr. Fox's opinion, though he supposes "no one in tfiifl 
country has gone into the subject of vegetable parasitic diseases and the arti- 
ficial growth of fungi more fully " than himself. Of course I do not doubt 
the correctness of this statement, and can only deplore that so much labour 
has been crowned with so very little success, that he is obliged to change his 
opinion on a modification of a well-knoivn form as often as he speaks or 
writes about it. With regard to G-regarines, Dr. Fox says that he has used the 
term " in the same sense as that in which Lindemann employed it." I hope, 
with Mr. Ray Lankester, " than whom no higher authority on this point exists,' 
" that it (the term Gregarlne) may never be again misappropriated thus." 
Sorry I am to destroy Dr. Fox's victory over poor PU*rococcw % — fc* I 
am obliged to give publicity to a letter of Professor Robin, of Paris, whose au- 
thority in these matters I hope even Dr. Fox will recognize. It runs thus : 
U 
12-20 foventibus. 
I hare examined, together with Dr. Beigel, some preparations which we have 
made of a growth taken from artificial hair. This examination convinced me 
that the vegetable growth is really a new species of Pleurococcvs, as already re- 
cognized by Rabenhorst and Kuchenmeister.— Dr. Chas. Robin, Professeur a 
la Faculte de Medecme de Paris. Paris, 18th August, 1867. 
I also insert here the botanical description of Pleurococcus Bekjeli as pub- 
lished by Kabenhorst, ■ Sitzungs-Berichte der Isis,' 1807, April-June, p. 51 : - 
" / eurococcus Beigelii, Kdchmst. et Kabenhorst. P. aerus, minutissimujS 
capillos emortuos zonatim eingens, sordide griseo-fuscescens ; celluhs globo^ 
vel muta pressione angulosis ^-7^'" crassis, dilutissime viridibus vel achr0ls J 
in familias numerosas conglobatas consociatis, muco matricali gelatmoso ac 1100 
firmo involutis ; cytiodermate subcrasso, achroo, hyaline, homogeneo ; ey \0- 
plasmate subtilissime granulato ; sporangiis plerumque ¥ ^ w crassis, gome 
If moistened with 
water they are easily removable. The single cells are mostly round, ana ai «* 
act of partition are as large as ^ part of a line. After partition the joinig 
cells attain very soon ^ part of a line in diameter. They are white and trans 
parent, but sometimes with a light green tinge. They are united m F^£ 
and involved in a rather thick, colourless mucus. The cell-membrane 1S . S0 ^_ 
as distinctly to show a double couture, but no layers are visible. It is 
geneous, and light like glass,'' 
In the paper above quoted Dr. Rabenhorst also described a s ^ nC ^ 
found on rejected chignon-hair, which I forwarded to him. The followi g 
a copy of the diagnosis : — - e «,cens ; 
" Glceotheca trichophila, Rabenh. G. aerea, trichophila, sord \ de r ,! U ^ bdlip io 
cellulis anguloso-rotundatis vel oblongis elliptisve diametro (7^0 J^ ^ 
longioribus, saturate purpureo-violaceis, seriatim disposih- ; cy 1 ^^ 
tenui^imo; tegumentis crassHsimis gelatinosis sublamellosi^ phrunuui 
fluentibusachrois." 
