LINNEAN SOCIETY OF LONDON. : 191 
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the forest which clothes the upward slope of the country; and that 
the high savannah-land of the interior. Within each of these 
i : 8 1ts own peculiar species are remarkably evenly distributed ; 
Ub occasionally, especially on th annah, this uniformity of 
latter kind the two most marked instances in British Guiana are 
€ savannah above the Kaieteur Fall and Roraima itself. The 
emarkable fact was pointed out that the vegetation of these two 
hich 
them and separates the two, is in certain strongly-marked features 
mmon and peculiar to 
areas. It was also pointed out that a few other such small areas 
as 
ote Roraima and the Kaieteur. A map of the route traversed 
and coloured drawings of the country and aspects of the vegetation 
___ Were exhibited in illustration of the paper. 
May 6. — Sir John Lubbock, Bart., President, in the chair.— 
Th, f. Henry Marshall Ward was elected a Fellow of the Society.— 
e following Auditors were nominated: Mr. J. Jenner Weir an 
7 _ Attention to framed water-coloured drawings of Letisomia aggregata 
and Fothergilla gardenia, botanical mementos of the two distinguished 
iclans, Drs. Lettsom and Fothergill.—Sir John Lubbock’s paper, 
~ “On Forms of Seedlings,” was by request adjourned, so as to give 
. : Pportunity for Mr. Romanes’ communication.—Mr. Geo. J. Romanes 
then read his paper, ‘‘On Physiological Selection ; an additional sug- 
Sestion on the Origin of Species.” He considered that, as a theory 
