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NOTICES OF BOOKS. 25 
Diecranella, An additional species of Campylopus must be recorded, 
for according to a specimen in the Wilsonian Herbarium C. brevifolius, 
dwarf species. 
tribe Grimmiee@ is well represented, but Campylostelium we 
opine Hay rather find a place near Seligeria. In Trichostomee we 
find Splachnobryum Wrightii, interesting as being one of the few 
a where a Cryptogamic plant has become naturalised.* Didy- 
Voirlich in 1863 by the late Mr. McKinlay. Although Ditrichum is 
retained in this tribe, we think its true place will be found to be near 
Dicranella and Distichium 
In the ba ibe Funariee we also find Bartramidula, where it must 
surely be of place; except the absence of peristome there is 
nothing to separate it from Phi “eneeee 
Stereodont maintained as a tribe, comprising Plagiothecium 
and Cyleadrstooues while the species of Stereodon are left in Hypnum ; 
the genus Stereodon (of w e mon H. cupressiforme is the 
type) is we think ve eer batt it may coal be let, with the other 
Hypnaceg. Most of the genera detached from Hypnum in the ‘ Bryo-- 
logia Europea” are here wisely regarded as sections Sof that genus, 
for however convenient as indicating natural groups of appsee their 
miss grow in 
Ireland, and which will doubtless yet reward a more searching 
investigation of the less explored BATE, e.g., Dicranum virens, 
mmia Doniana, Aulacomnium androgynum, Se. 
In conclusion, we would speak highly of Dr. Moore’s work, bear- 
ing evidence throughout of industrious research, and an ardent attach- 
ment to the study of the interesting little plants which are here 
sO carefully recorded. R. B. 
Pe of Docicties. 
Royat Socrery.— Wov. 20th, 1873. _Sir Geo. B. Airey, President, in 
chair.—‘‘ Note on the Electrical Phenomena which accompany 
rection. The strength of the current is determined by the amount 
of petiole cut off with the leaf, the shorter the petiole the greater the 
* See Journ. Bot., 1872, p. 193, tab 123. 
