ERRATUM. 
P. 323.—In the reson gaat of the plate of Scirpus parvulus, Nos. 8 and 
9, instead of “ leaf,” read barren stem. Figs. 1 and 2 give an appearance of 
two sheaths surrounding the ten of the stems, which is incorrect, as there is 
only one.—A. G. M. 
RINTED BY TAYLOR 
ND CO 
LITTLE QUEEN STREET, LINCOLN ^8 we FIELDS. 
