44 FERNS IN THEIR HOMES AND OURS. 



are devoted to the ferns out of the 214 devoted to 

 Cryptogams. Besides this there are many other 

 references to ferns in the chapters on General 

 Morphology and Physiology. In the preface it is 

 stated, "This text-book is intended to introduce 

 the student to the present state of our knowledge 

 of botanical science." And again : " In the refer- 

 ences which will be found in this work, the chief 

 object has been to introduce the student to those 

 writings in which he will find a full discussion of 

 the subjects which have only been touched on 

 briefly. . . . The reader of this work will at least 

 learn the names and standing of those workers who 

 have in recent times contributed most essentially to 

 the science of which it treats." In the translator's 

 preface is this : " The translator believes that he is 

 supplying a want that has long been felt by English 

 botanical students. Our own literature has not at 

 present produced any work at once so comprehen- 

 sive in its scope, and so minute and so accurate in 

 its details, qualities which have recommended 

 the German work to every one familiar with that 

 language." This book is illustrated by 461 figures, 

 chiefly the result of difficult microscopic analysis. 

 It may be found in many libraries, and to the 

 student is simply invaluable. The price in this 

 country is $9. 



ON THE DEVELOPMENT AND FRUCTIFICATION 

 OF THE HIGHER CRYPTOGAMIA, AND ON THE FRUC- 



