100 
INDEX TO TRANSACTIONS. 
Roper, F. C, on the genus Biddulphia 
and its affinities, 1. 
T. 
Tomkins, J. N., on a new diatom - 
finder, 57. 
U. 
Universal attachment of the object-glass 
to the body of a compound micro- 
scope, remarks on the report of the 
sub-committee on the best form of, 
by Mr. Beck, 92. 
W. 
Warington, R., a description of some 
useful additions to his portable 
microscope, &c., 58. 
TRANSACTIONS. 
Erratum in Vol. VII. 
Page 68, line 9, for " Bagster " read " Bagshaw." 
PRINTED BY J. E. ADLARD, BARTHOLOMEW CLOSE. 
