38 
Mr. R D. Darbishire, F.G.S., exhibited Tryon’s mollusca 
and the atlas of plates to Prof Hseckel’s “ Die Radiolarien,” 
Mr. Wills (who was present as a visitor) exhibited an 
interesting series of preparations of desmidiae, and stated 
that when in Wales last year his father took a large gather- 
ing of desmidiae from the stream as it flows out of the lower 
of the two Capel Curig lakes. They were embedded in 
mosses of the well known infusorian Ophrydium ver- 
satile and also in the accompanying weeds, and it is about 
some of the rarest found in this gathering that he remarked. 
But first he called attention to the fact that they were found 
in flowing water, not a usual situation ; on this point Ralfs 
says “ They are rarely gathered in streams, being unattached, 
and very minute, nevertheless, interesting species may' 
occasionally be gathered where the current is so sluggish as 
to permit their retaining mucus to elude its force. The 
current in the case of these desmidiae certainly was the 
reverse of sluggish. 
In the slides shown, he pointed out many common 
species, but also several rare ones, some new to England, 
others new to the British Isles, and three new to science, one 
of which his father had successfully demonstrated to have 
been recorded for the first time last summer. 
Those new to England but recorded before as Irish, Scotch, 
or foreign species are : 
Spondglosium pulehellum (Archer) 
Tetrachastrum mucronatum (Dixon) 
Cosmarium cyclicium (Lundell) 
„ holmiense „ 
„ nymamanum (Grunow) 
„ pseudo connatum (Nordstedt) 
„ pseudo pyramidatum (Lundell) 
„ truncatellum (Perty) 
„ variolatum (Bulu) 
„ globosum (Lundell) 
