the small type supplementary material for more advanced students, especially 

 those with medical background. An attempt has been made to review the world- 

 literature on embryology since 1943, in particular as far as it affects human 

 development. 



In the first part general developmental aspects have been given, while in the 

 second part the various organ systems have been treated systematically, grouped 

 into entodermal, mesodermal and ectodermal derivatives. A laboratory manual 

 of the embryology of the chick and the pig is added in order to make the 

 development of the human fetus more easily understandable. 



Besides the normal development, the main results of the experimental analy- 

 sis in other groups of Vertebrates are given in the textbook on human embryo- 

 logy in order to give the student some insight in the causal relationships which 

 lead to the special form and structure of the individual organ systems and 

 which might lead under abnormal conditions to an aberrant development. 



The form of presentation of the material is very instructive, and the clearly 

 written text is well illustrated. The present form of this textbook with large 

 and small type is therefore very successful. The large number of references at 

 the end of each chapter will stimulate further reading. We should therefore 

 like not only to recommend it warmly as an excellent textbook on human em- 

 bryology, but also to congratulate the author on this successful revision of the 

 book. 



P. D. NIEUWKOOP 



"TRATTATO DI ISTOLOGIA" 



4th revised and enlarged edition, 1954 



by G. Levi In two volumes 



1171 pp. with 839 figs, partly in colour Unione Tipografico-Editrice Torinese 



Price: L. 12.000,— 



In this fourth edition the chapters on mitosis and meiosis have been consider- 

 ably extended. During recent years two fields of analysis have made particu- 

 larly rapid progress, the analysis of the ultrastructure of the cell, and that of 

 the chemical composition of cells and tissues. The results of the first field are 

 extensively incorporated in this edition. Some of the most recent data in the 

 field of histo- and cytochemistry are considered by the author as being still 

 too premature to stand all criticism. They have therefore only partially been 

 incorporated in this edition. 



This book is primarily meant for students in medicine, but may according to 

 the author also be useful for postgraduates in medicine and natural sciences. 



After an extensive description of the methodology and general properties 

 of the living substance in the first part, the second part deals with the cellular 

 structures, and finally the third part, covering the last chapters of the first and 

 the entire second volume, deals with the various tissues. The second and third 

 parts are treated systematically. 



This very well organized textbook gives an enormous wealth of information, 

 not only on morphological, but also on histophysiological and to some extent on 

 histochemical data. Besides the adult structures many data on the embryological 

 development, descriptive as well as experimental, have been incorporated. 

 Regeneration and tissue culture in particular are extensively treated. 



We consider that some of the pictures should be replaced by better examples 

 and, more especially, that they could be reproduced better. Particularly the 



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