6 INTRODUCTION. 



Previous, however, to the pubHcatiou of Dr. Greville^s 

 works, tliere were other publications that ought not to be 

 passed over. An excellent account of the method of Dv. 

 AYalker, the well-known Professor of Natural History in 

 the University of Edinburgh, is given by my worth}^, kind- 

 hearted friend. Dr. Patrick Neill, in his very able article in 

 the ' Edinburgh Encycloj)a3dia/ on Ftic?^ which has received 

 the most unquestionable praise by being largely quoted by 

 all subsequent writers on the subject, to whicli, as a rich 

 quarry, I have already had recourse, and to which I am sure 

 the author will make me welcome again and again to return. 



Of another voluminous work, at present lying before me, 

 it would not be easy to speak in terms of too high approval, 

 we mean Mr. Dawson Turner^s ' Historia Eucorum,' illus- 

 trated by coloured engravings chiefly by Mr. (now Sir) 

 AVilliam Jackson Hooker, who has, by his pencil and by his 

 pen, not only sustained but greatly increased his fame thus 

 early acquired. Respecting the descriptions and the illus- 

 trations, Sir James Edward Smith remarks, " Xever was 

 there a more perfect combination of the skill of the painter 

 and the botanist, than in this work.''' 



]^or must Miss Hutchins be omitted, whose name will 

 long be honoured by Algologists. Mr. Dawson Turner, 



