BOOKS AND CURRENT LITERATURE 365 



sion of many general observations incident to the extensive investiga- 

 tions of the author in Mexico, Australia, New Zealand and Africa; 

 Part II describes the life history of the cycads, and Part III treats the 

 phylogeny and evolution of the group. The language used, even in 

 the chapters dealing with the life history, is so clear and simple that 

 the average educated person can grasp it. Nearly one hundred well- 

 chosen photographs and drawings serve to elucidate the text. The 

 publication is to be followed by a more extensive account of the author's 

 research on the morphology of the cycads. — J. G. Brown. 



