BOTANICAL INFORMATION. 245 



eighteen Lessons are descriptive of as many species of Mosses, 

 accompanied by specimens, and several of them are of rare oc- 

 currence. We think few will peruse this little book without de- 

 siring to know more of the family of plants of which it treats. 



Phycologia Britannica ; or History of the British Sea- 

 iveeds, by W. H. Harvey, M.D. M.R.I.A.., &c, &c. 



Four numbers of this beautiful work are already before 

 the public, and the judgment of that public has been pro- 

 nounced upon it. We believe of its merits there can be but 

 one opinion, viz. that at no period of botanical literature has 

 a more important contribution been made to the Flora of the 

 British Isles than on the present occasion. Of Dr. Harvey's 

 fitness for the descriptive portion of the work, a moment's 

 doubt could not be entertained ; but it adds infinitely to the 

 value of the plates, to know that not only are the drawings 

 and analysis all executed by Mr. Harvey's own hands, but 

 the plates (lithographs) also; thus ensuring the most perfect 

 accuracy to the figures, as well as the letter-press. The 

 work will be completed in sixty numbers, and each number 

 contains six coloured plates, at the moderate price of 

 2*. 6d. These appear without reference to systematic order, 

 but at the conclusion of each volume, and more fully at the 

 completion of the entire work, systematic and alphabetical 

 indexes will be added ; and finally a general introduction, to 

 be prefixed to the last volume, will complete the history. 

 The plates represent the natural size and magnified dissec- 

 tions of the species, accompanied by generic and specific 

 characters, synonyms, British habitats, the geographical 

 distribution and general history of each individual, in a fuller 

 and more perfect manner, than has yet been attempted in 

 any work exclusively devoted to the illustration of British 

 Algae. 



We heartily wish it all the success so useful a publication 

 merits. 



