280 NOTICES OF BOOKS. 
Rickmansworth, on both sides of the county boundary; yet the 
solitary instance of its occurrence given in the Middlesex Flora is 
the copses around these fields. Within the last day or two I have 
gathered Geranium columbinum, Scirpus fluitans, Campanula hybrida, 
and several other species, all of which appear to be singularly scarce 
in the county. For C..hybrida the only station given is Harefield, 
being “ now confined to the chalk’; but it grows in fields about 
Ruislip reservoir-fields, far removed from the chalk. Athyrium 
Filix-femina (presumed to be ‘ extinct”) grows sparingly in Old 
Park Wood.—Joun Benzow. 
NOTICES OF BOOKS. 
The Student's Flora of the British Isles. By Sir J. D. Hooxzr, 
K.C.8.1., &. Third Edition. London: Macmillan, 1884, 
pp. xxii. 568. 
ow 
on the other hand, 8S. céspitosa, formerly retained as a species, 18 
now reduced to a form of JS. hypnoides. S. Andrewsii is relegated 
e 
Nicholson. Mr. Ball has contributed many notes; Mr. Arthur 
Bennett has revised the Potamogetons; while the eighth edition 
