LEATHESIA CRISPA 329 
identical with Fries’s R. mollis var. glabrata, and I suppose oH 
Scottish ar must now be called without wipe re var. glabrat 
Ley. It will be seen that I was unable to come toa conclusion 
on this sna and indicated my hesitation in ny aper by a ‘?.’ 
rzejowscit Stev. Besser’ Pigg cimens, could they ae 
inspected, should clear up some of the uncertainties which bes 
this rose. My description of the leaves follows Déséglise, but ° 
have no literature at hand by which to follow out the subject. 
Some of the British plants assigned to this are remarkable plants, 
bearing large subfalcate thorns and wk ea petioles. If 
not Steven’s plant, they must bear a 
R. cinerascens Dumort. Here i Darolby has pea a real 
error in my paper, of which I can give no account. sepals 
are clearly as he says, but the thorns seem to be sable as in 
ndrzejowscit. We owe him a debt for this correction, whic 
will make the true position of this plant lie next to BR. omissa 
ee pred 
ta Ley. I was of course aware that Crépin assigned 
this form a the group Coritfolia. But Mr. Baker still (in 1907) 
assigns it to the Villosa group, and my Sutgoniees concurs. Will 
not some botanist who has access to the living plant kindly make 
the test of the nose, and tell us the result? It should be final. 
LEATHESIA CRISPA Harv. 
By A. D. Corton, F.L.S. 
urinG the past June a number of specimens of an alga, 
which proves to be the little-known Peathesta crispa Hary., were 
collected on the Dorset coast near Swanage 
When first examined it was at once evident that the plant 
represented a species described and figured b uckuck as 
L : : 
reproduction of Kuckuck’s figures in Oltmann’s Morphologie ae 
Biologie der Algen (Bd. 1, figs. 233-4). L. concan na Kuck. was 
one qoewn from two localities, and had not been 5 shaded ufeed 
te De Toni’s Sylloge Algarum reference is made to L. crispa 
Harv., but neither diagnosis nor original reference is given. 
species. With the ‘exception of Chalon, no previous observer 
appears to have noted this; Chalon, however, in his recently 
