58 JOHNSTONE, ON BRITISH SKA-WEEDS. 



now several years, and Ave should be glad to find the authors 

 of the present volume undertaking such an introduction — a 

 work for which they are evidently most competent. 



The work is very properly dedicated to the memory of the 

 late Mrs. Griffiths, of Torquay. She was not only a brilliant 

 example of what her sex may do for the advancement of 

 science, but her many discoveries of species, and devotion to 

 scientific pursuits, entitle her to the gratitude and respect of 

 all who are interested in the progress of natural history 

 studies. 



The description of the plants which accompany the plates 

 appear to us to be drawn up with care. Of course, exten- 

 sive use has been made of the works of Dr. Harvey, of 

 Dublin, to whom algology is so largely indebted. The 

 authors seem, however, to have had extensive communication 

 with those best acquainted with British algae, and their re- 

 ferences to habitats are extensive. The synonymy is also 

 carefully given, and references made to the works of authors 

 who have written on the subject of algology. We have 

 great pleasure in strongly recommending this work to the 

 attention of all who are interested in the study of the vege- 

 tation of the seas of Great Britain. 



