REVUE BRYOLOGIQUE 
Bibliographie 
_ G. Rorn. — ie europæischèen Laubmoose. Band H, Leipzig, 
Wilhelm Angelmann, 1901. 
Herr Roth may be congratulated on the speedy and successful 
. completion of the publication of his important work on European 
bryology, the first volume of which was noticed in this review 
by D' Brotherus (Rev. Bryol. 1904, p. 15), The second volume 
the student of European mosses, who wishes to keep abreast of 
_ recent discoveries. As an indication of what has been done during 
the last 30 years, it may be noticed that while 78 species only of. 
 Bryum are described in the second edition of Schimper’s Synopsis | 
(1876) no less than 156 species are described in the present work. 
Our knowledge of other critical genera such as Philonotis, 
= Brachythecium, Amblystegium and the Harpidium group of Hyp-_ 
num, for which the Author adopts Carl Muller's name Drepano- 
 cladus, is brought up to date in a similar way. < 
= Tconcur with Dr Brotherus in his notice of the first volume in 
 regretting the absence of keys, especially in the larger genera. 
_ There is, [ am aware, some difference of opinion as to the value 
= of keys, but speaking from my own experience, 1 have found 
those of the late Herr Limpricht's work very useful. 
k The diagnoses are fairly concise, though there is no sacrifice 
of essential details and they are amply‘supplemented by the 
_ plates, which form a very important feature of the work and no 
Pains have been spared in rendering them as complete as pos- 
_ sible. The drawings are entirely original and the author has 
_ aimed at giving the general facies of a leaf with an indication of 
_its areolation throughout as seen under a low microscopie power. 
and this is generally supplemented by the capsule and in some 
cases with details of the peristome or other features as seen under 
higher powers. The general appearance of a leaf as seen under a 
= low microscopie power is often very happily portrayed, so well 
_indeed that à friend suggested that some of them looked as if 
they had been pholographed from nature direct The method of. 
reproduction has not enabled the detailed drawings of the peris-_ 
tome and other highly magnified structures to come out quite s0 
_clearly as the leaf drawings, though no doubt they will often be 
found useful. Es - dr res 
= The book is well printed on good paper which, in a book 
destined to be in use for a long time, is a feature of considerabl 
which completes the work fully sustains the character of the first 
and forms à practically indispensable addition to the library of 
