378 Bibliography. 
The Rev. Mr. Phelps had prepared a book of this kind, to accompany 
the British Flora of Dr. J. E. Smith, President of the Linnean Society 
of London, which was well received. His method was adopted by 
Miss Johnson, with some amendments. ‘The Botanical Teacher gives 
Lindley’s concise generic descriptions of the genera, without abbrevia- 
tions; but the specific descriptions are given by abbreviations. By 
using but one set of words, a general system of North American plants 
is compassed in a small volume of 268 pages. 
This treatise is universally approved by all correct teachers of bot- 
any, who have seen it. On a hasty view, the abbreviation plan may 
appear forbidding. But by a card properly adjusted, the reader sees 
every abbreviation at one glance of the eye, without opening the book. 
Being prepared by an experienced teacher for the use of her own 
pupils, and for the general extension of the science among young 
scholars, (for whom she considers botany as better adapted in early 
youth than any other study,) nothing is charged on the work for au- 
thorship. Therefore a class of a dozen pupils can be furnished for 
about half as many dollars. 
As it is fitted for the vest pocket, and contains all North American 
plants, ( excepting some recent discoveries in California and other dis- 
tant regions,) it is most perfectly adapted to the wants of experienced 
botanists, who collect plants in fields and foregs. 
Errors, misprints, and omissions are to be found in it as in all books. 
But considering the great care and labor required in reducing a general 
system of the botany of a continent to a book of a hand’s breadth and 
thickness, the errors are very few. 
mF Monographie @ Echinodermes vivans et fossiles, par L. Agas- 
siz. 2d livraison, contenant les Scutelles. 
M. Agassiz’s Monograph of the Echinodermata, living and fossil. 
2d livraison, comprising the family Scutella, seams ) Ato. pp. 131, and 
27 plates. Neuchatel, July, 1841 
In Vol. xxxvu, p. 369, of this Journal, we saiciattnad the appearance 
of the first livraison of this work, and gave an abstract of its contents. 
That part, it will be remembered, was devoted to the family of the 
Saleniarii, and a conspectus of the genera and species of that family 
will be found in the notice alluded to. The present livraison embraces 
that part of the family of the Clypeastroides containing the Scutellarii. 
It is prefaced by an iiteresting petmpter on the » iste, different divis- 
ions, general form, stri s, and geo- 
logical and geographical distribution of Pm oie: 
In twenty seven. elaborate plates, in part colored, we are presented 
with about two hundred and thirty distinct figures, including enlarged 
