64 pictures are phase contrast photographs of living ova. The later stages 

 were incubated in follicular fluid, or in serum to which pieces of tubal mucosa 

 had been added. The atlas is divided into 5 sections, dealing respectively with 

 growth, maturation, nutrition, fertilization and early development.lt is preceded 

 by a short historical introduction by H. Speert, and concluded by an appendix 

 containing some information on the techniques used, a bibliography of earlier 

 publications of the author, and a curriculum vitae. Concise texts in German, 

 French and English accompany the plates, forming a more or less continuous 

 story. The reproduction and printing of the plates are very good. 



It is a pity that the technique used for making each picture could not have been separately 

 indicated. Also one would have wished for more technical detail about the phase contrast 

 procedure used, particularly as regards illumination. 



"THE BIOLOGY OF STENTOR" 

 1961 

 by V. Tartar Pergamon Press 



(International Series of Oxford, London, New York, Paris 



Monographs on Pure and Applied Price: 75 s. 



Biology, Zoology Division, Vol. 5) 

 413 pp., 99 figs., 1 coloured pi. 



This monograph is devoted entirely to one genus, the ciliate protozoan 

 Stentor. So much information about this genus has accumulated in the course 

 of more than a hundred years, that a compilation into one volume is fully 

 justified. In the bibliography of this book there are more than 200 titles dealing 

 with the genus Stentor alone. 



The author of the book has been engaged in experimental work on these 

 organisms for a period of twenty years. Stentor is better suited for microsur- 

 gical manipulations than any other unicellular organism, and with this book 

 the author hopes to provide the basis for much more experimental work. 

 Much of the experimental work compiled in this book deals with morphogenesis 

 in its widest sense, and is therefore of direct interest to embryologists. 



The book includes a useful chapter on experimental techniques. A final 

 chapter presents some theoretical considerations concerning, among other 

 things, the interactions between nucleus, endoplasm and ectoplasm, and more 

 particularly the autonomous pattern present in the latter. 



The book is richly illustrated with simple but clear line drawings. The 

 bibliography is divided into a part dealing with Stentor, and a general part. 

 There are author and subject indexes. The printing of the book is very good. 



"NEW APPROACHES IN CELL BIOLOGY" 

 1960 

 Editor: P. M. B. Walker Academic Press 



216 pp., 58 figs., 3 tabs. London and New York 



This book contains the papers delivered at a symposium which formed part 

 of the fifteenth International Congress of Zoology, held in London in 1958. 

 At least six of the fourteen papers are of direct interest to embryologists. 

 Among these are papers by Moore (nuclear transfer of embryonic cells), 

 Waddington (ultramicroscopic structure of developing systems), and Clayton 

 (labelled antibodies and differentiation). 



The papers generally range from about ten to about twenty pages. Some of 



284 



