170 
IJ^DEX TO TRANSACTIONS. 
0. 
Object-compressor, description of, 159. 
Object-finder, micrometer, 88. 
Objects, preparing and mounting, 59. 
Orthosira, 83. 
Osborne, S. G., on vegetable cell-struc- 
ture in the wheat plant, 104. 
P. 
Pandorina, 137. 
Pinnularia, 87. 
Pleurosigma, (?) n. sp., 67. 
Psylla Buxi, 130. 
Psyllidse, on laap, the cup-like coverings 
of certain, 123. 
R. , 
Rana temporaria, organs of cutaneous 
respiration in, 148. 
Respiration, cutaneous, organs of, Dr. 
G. Harley on, in the frog, 148. 
S. 
Shadbolt, G., Address as President of 
Microscopical Society, for 1857, 133. 
Stauroneis, 87. 
Synedra, 83, 87. 
T. 
Tryblionella, 79. 
W. 
Wheat plant, on vegetable cell-structure 
in the, 104. 
LONDON : PRINTED BY J. E. ADLARD, BARTHOLOMEW CLOSE. 
