The book has numerous excellent illustrations, many of which are original. 

 The book is well produced and is concluded by a subject index. 



16 GRUNDRISS DER ENTWICKLUNGSGESCHICHTE 



DES MENSCHEN 

 7th. revised edit. 1970 

 by O. Grosser f Springer- Verlag 



revised by R. Ortmann Berlin - Heidelberg - New York 



215 pp., 200 figs. Price: $ 7.70; DM 28.— 



Revised editions of this well-known book appear at regular intervals. The 

 last three ('59, '66, '70) were revised by Professor Ortmann. He has always 

 succeeded in incorporating new advances without unduly expanding the book. 



In the present revision first of all some recent advances in induction research 

 and molecular genetics were incorporated. Secondly, some attention is devoted 

 to the histochemistry of organogenesis. Finally, new chapters were devoted to 

 twinning, to cardiac malformations, and to the developmental state at the time 

 of (precocious) birth. 



Production and illustrations are excellent as always. 



17 PLANARIAN REGENERATION 



1969 



by H. V. Brondsted Pergamon Press 



Intern. Ser. of Monogr. Oxford etc. 



in Pure and Appl. Biol.. SBN 08 012876 9 



Zool. Div., Vol. 42 Price: 100 s.; $ 13.50 

 284 pp., 166 figs. 



Few animals exhibit such amazing morphological plasticity as the flatworms. 

 Therefore they have always been of great value for the study of morpho- 

 genesis. H. V. Brondsted, who has been working with them for more than 

 30 years, is eminently qualified to provide the synthesis that has been badly 

 needed for a long time, and he has taken the job very seriously. The book 

 presents a virtually complete review of experimental work extending over 

 almost 200 years, placed against a general embryological background. 



The style of writing is somewhat old-fashioned in places, but on the whole 

 the author expresses his ideas remarkably well in a language that is after all 

 not his own. Brondsted's major personal contribution to the field has been 

 the notion of the "time-graded regeneration field", which is extensively 

 discussed. 



The complexity of the field is reflected in the large number of chapters (23). 

 These will not all be enumerated. Early in the book there is an interesting 

 historical introduction, a very useful chapter on systematics, morphology and 

 cytology of planarians, and a chapter devoted to Morgan and Child, the early 

 pioneers. Towards the end there are chapters devoted to Child's gradient 

 hypothesis (which is discounted although its great heuristic value is acknow- 

 ledged), and further to biochemical and biophysical work, to the famous 

 experiments on regeneration and learning in planarians, and to genetic aspects 

 of regeneration. 



The book is well illustrated. The bibliography covers some 700 titles and is 

 up-to-date until 1966. Some more recent papers are discussed in an addendum 

 and an appendix. Unfortunately the important work of Coward (1968) with 

 actinomycin D is not included. 



The book is concluded by indexes to authors and to subjects and species. 

 There are a number of errors in authors' names, years, figure and page 

 numbers throughout the book. One author (Holzinger = Holtzer?) is absent 

 both from the bibliography and from the authors' index. 



19 



