134 
MICROSCOPICAL AND NATURAL HISTORY SECTION. 
March 13 th, 1870. 
Professor W. Boyd Dawkins, F.R.S., F.G.S., in the chair. 
Mr. John Boyd was elected a Member, and Mr. Robert 
Ellis CunlifFe, and Mr. Walter Edward Barratt, Associates 
of the Section. 
Mr. Charles Bailey exhibited a series of slides illustrat- 
ing similarities of structure in Dicotyledonous and Monocoty- 
ledonous stems. 
Mr. Bailey likewise distributed among the members dried 
plants of Potamogaton lanceolatus sm. from Lligwy, Anglesea, 
that locality being still the only recorded habitat for this 
rare Pondweed; and exhibited some Egyptian plants 
collected by H. A. Hurst, Esq., Treasurer of the Section — 
the most noteworthy of which was Tamarix articulata— 
from Alexandria. 
Mr. R. D. Darbishire, F.G.S., exhibited a series of speci- 
mens of very young Rhombus vulgaris (Cuv.), showing (1), 
the two eyes on each side of the vertebral plane, (2) the 
removal of the eye from the underside to the dorsal edge, (3) 
the appearance of both eyes on the one (upper) side of the 
fish. These specimens had been found and given by Dr. A. 
W. Malm, of Gothenburg ; who first proved the remarkable 
physiological change of form. Dr. Malm stated that he had 
had no difficulty in procuring specimens so young as these 
by using a surface net at sea before dawn in the hot days 
of summer. These were taken in the Kattegat on the 25th 
July, 1875. 
