MOSSES WITH HAND-LENS AND MICROSCOPE 317 
rom the scientific value. The value of the plates depends largely 
on the fact that many of the species have never been figured before. 
lovist : bs as its scope 
neludes the whole pe, it should prove an indispensable 
andbook to fia student of European mosses. The whole of the 
text is German . 
Mosses with Hand-lens and Microscope. A non-technical Hand-book 
of the more wh ee Mosses of the North-eastern United States. 
By A. J. Gro Part II. New York. 1904. Pp. 87-166. 
Price : dollar 
Tae first part at this book appeared in June, 1908, and was 
noticed in this Journal (p. 819). The scope and object of Mr. 
Grout’s work were there described, and it is unnecessary to repeat 
what was there stated. Part I. treated of the Acrocarpi from 
Sphagnacee to Dicranacea, Sa ae? in all about forty-four species. 
art II. advances the subject as far as the genus Tortula, and contains 
nearly one hundred species. The nu mber of species allotted to a 
given genus are often very few, and limited to the commonest, and 
those most easily identified. The Sphagnacee receive a short and 
generalized account, with figures, but without mention of definite 
species. Seligeria has but a few lines of daeenibtio on, and Archidium 
is wholly omitted. On the other hand, eleven species of Dicranum, 
number of Grimmia, and seven of Ephemerum receive 
recognition. The keys appear to be clear, simple, and trustworthy, 
though often unsuited to the determination of sterile specimens. 
The diagnoses, though often brief, are very practical, and confined 
d 
original, but the majority are excellent reproductions from the plate 
of the Bryologia Europea, a work which, owing to its costliness, 
beyond the reach of most students. 
Though primarily intended for American sires Mr. Grout’s 
book would form a useful addition to the working library of any 
British bryologist, since the “eye are in many cases a seoduible to 
both. Further, it is so well and so attractively “illustrated 
as to constitute one of the aha Ai Printoe to a beginner to take 
up the study of mosses. A> Gise: 
