162 THE JOURNAL OF BOTANY 
Henry, often attains 80 ft. in height and thrives on peat-mosses 
and on rocky soil, so thick with boulders that practically no vege- 
tation existed except this hardy Pine), Lareh, Quercus sessiliflora, 
and @. pedunculata. He pointed out that these two species differed 
as to soil and situation, and complained that their areas had never 
been mapped out in England. The causes favouring the existence 
matic botanists had only asked from collectors specimens with 
leaves, flowers, and fruit: material to be named and classified. 
cases species (as the Arbutus) were put down as shrubs, though 
there was plain evidence that they attained the size and filled the 
functions of forest trees. 
SHORT NOTES. 
Leprosarca: a correction.—This new antarctic alga, described 
in the last number of the Journal (p. 108), was unfortunately figured 
in too diagrammatic a manner in tab. 470. The walls of the large 
internal cells are drawn three or four times too thick in fig. 114, 
made evident. The walls are in reality only about 2 » thick, except 
at the edge of the frond (fig. lla), where the sure 
They are in fact so thi » When the thallus is dried unde 
pressure, the inner cells are quite crushed and indistinguishable, 
and cannot be made to swell out again, and the thallus is reduced 
to one-quarter of its normal thickness. The large cells in question 
have a diameter of about 200 #, and extend across the section 
ost from cortex to cortex. Again, the cortical layer is wrongly 
represented ; it is in reality monostromatic, save at the edge of the 
thallus, where the cells form two or three rows. The cortical cells 
measure 12-15 p long by 6-10 p thick. Finally, the subcortical 
cells are represented as empty, though really they have a thin 
protoplasmic lining with plastids.—A. & E. §. Grpp. 
Gateoprsis Lapanum L. (p. 129).—The plant which I mean from 
Glamorgan (whence it has long been recorded) is G. angustifolia 
