The title of the symposium might be somewhat misleading, since the topic 

 was not pregnancy as such, but rather various aspects of early mammalian 

 development. All but one of the 16 papers deal with recent work on mammalian 

 eggs and blastocysts, including fertilization and implantation. It is impossible 

 to enumerate the contributions one by one. Suffice it to say that the following 

 fields are represented: ultrastructure. in vitro culture, experimental mor- 

 phology, genetics and karyotype analysis, cytochemistry, biochemistry, 

 physiology, and endocrinology. 



All the discussions held at the symposium are recorded. Together they 

 occupy nearly one third of the book. Apart from being very stimulating, they 

 provide much additional information with appropriate literature references. 



The book is profusely illustrated, mainly with good photomicrographs. It is 

 concluded by author and subject indexes. 



44 TRENDS IN PLANT MORPHOGENESIS 



1966 



Editors: E. G. Cutter, A. Allsop, Longmans, Green & Co. Ltd. 

 F. Cusick and I. M. Sussex London 



345 pp.. 31 figs., 8 pis., 4 tbs. Price: 70 s. 



Contributors: Alhop (Manchester), Biinning (Tubingen), Carr (Belfast), Cusick (Aberdeen), 

 Cutter (Davis, Calif.), Dixon (Liverpool), Garrison (Norton, Mass.), Heslop-Harrison (Bir- 

 mingham), Maheswari (Delhi), Martens (Louvain), Park (Belfast), Robinson (Belfast), Sinnott 

 (New Haven, Conn.), Stebbins (Davis, Calif.), Steeves (Saskatoon), Steward (Ithaca, N.Y.), 

 Sussex (New Haven, Conn.), Wareing (Aberystwyth), Wetmore (Cambridge, Mass.) 



This collection of essays is a tribute to Prof. C. W. Wardlaw of Manchester 

 University. The editor's foreword is devoted to his life as a scientist, and the 

 book contains a complete bibliography of his writings. 



The 17 contributions which make up the book are essays rather than papers, 

 since the emphasis in them is on authoritative description and assessment of the 

 present state of the subject, rather than on the communication of limited re- 

 search findings on specific topics. The essays are grouped in five sections as 

 follows: 'Organization in plants" (5), "Embryology" (1), "Differentiation and 

 its control" (3), "Phylogeny and morphogenesis" (2), and "Regulation of 

 growth and form" (5). The concluding essay by E. Biinning is entitled "Con- 

 tributions of botany to general biology". 



Although the book as a whole is clearly directed at botanist readers, and 

 points of contact with animal morphogenesis are rarely mentioned, several of 

 the essays will be read with interest by animal developmental biologists, par- 

 ticularly those interested in general principles of morphogenesis. The following 

 may be mentioned specifically: "Physiological aspects of organization" 

 (Steward), "The geometry of life" (Sinnott), "Polarity gradients and the 

 development of cell patterns" (Stebbins), "Morphogenesis at the subcellular 

 level" (Heslop-Harrison), and three contributions on morphogenesis and deter- 

 mination in shoots and leaves (by Wetmore and Garrison, Steeves, and Cutter 

 respectively). 



The book is well printed and well illustrated, and is concluded by author 

 and subject indexes. 



45 SYSTEMATIC EMBRYOLOGY OF THE ANGIOSPERMS 



1966 

 by G. L. Davis John Wiley & Sons, Inc. 



538 pp. New York - London - Sydney 



The bulk of this book consists of a catalogue of the embryological char- 

 acteristics of angiosperms arranged alphabetically by families. The families 

 are those recognized by Hutchinson. Embryology is defined, following Cave, 

 as encompassing the development of the entire ovule and anther, including 



294 



