80 PROCEEDINGS OF SOCIETIES. 
quantity in a pond close to Enniskerry. He was able likewise to 
exhibit another species, so far as he was aware hitherto unre- 
corded in this country, namely, Gidogoniwm acrosporum (de Bary). 
This occurred exceedingly sparingly ; indeed, he had seen only 
two or three examples of the fructification. This is of a different 
type from the preceding, beg a gynandrosporous species ; and 
the specimen well showed the dwarf male plant and the oogonium. 
Mr. Archer also showed in fruit Gidogoniwm echinospermum, as 
well as the same Gidogonium he showed at the meeting of the 
Club in July, 1865 (the minutes of which for details please see), 
and as to which he felt somewhat in doubt as to its being Gidogo- 
nium apophysatum (Pringsheim) or Cidog. setigerwm (Vaupell). 
But be it as it may, he would here mention that he had taken 
this latter plant, quite identical in all its characters, for three 
successive years from the same pool, also from one or two adjacent 
ones, as well as on the occasion of a visit to the Vartry bed; the 
exact spot there he could not recollect, but at all events it is one 
which will be completely submerged when the long-delayed Vartry 
water-works are completed. These three gynandrosporous forms 
(the first new to this country) were in fruit, showing the oogonia 
and dwarf male plants (the latter of the structure called “ outer”’ 
by Pringsheim) very beautifully. 
Mr. Archer then drew attention to a form of Saprolegniaceous 
plant which seemed without doubt to be undescribed. 
When at first glance he saw this form, he momentarily thought 
he had encountered a true and distinct gynandrosporous type of 
fructification in the Saprolegnie, the existence of which, a priort, 
one would be disposed to believe likely, and which Pringsheim’s 
observations, mentioned in his magnificent memoir (‘ Jahrbiicher 
fiir wissenschaftliche Botanik,’ Band ii, p. 213; ‘ Nachtrage zur 
Morphologie der Saprolegnieen’), all but directly prove. As 
illustrative of the term “ gynandrosporous,” and as explanatory of 
what he thought he had found, Mr. Archer was happy in being 
fortunate enough to be able to exhibit the three species of C&do- 
gonium on the table, well showing this type of fructification. 
Having, however, drawn attention to its nature and peculiarities 
during that demonstration, it would be here unnecessary again to 
take up the time of the meeting by referring to the points in- 
volved. It was besides the less necessary to do so, inasmuch as 
in the form now shown, the fructification, upon being more closely 
examined, was seen to bear only a superficial resemblance to the 
gynandrosporous type, and, as will be seen presently, is truly 
moneecious, though exhibiting what is seemingly a remarkable 
modification of the latter type of fructification. 
It may seem, and doubtless it is, a rather lame thing to come 
forward and to describe a new species without knowing definitely 
to what genus it belongs; but Mr. Archer thought himself justi- 
fied in drawing attention to this plant, owing to its seemingly 
