That this book has arisen from long years of personal experience is clear 

 from the addition of many technical notes to the text. 



Again a quite different approach is followed in the fourth part, a compila- 

 tion of experimental work on Arbacia punctulata arranged alphabetically under 

 topics. With each topic a few important references to other species are given. 

 The whole section comprises 83 pages written in note form and printed in 

 small type. 



The bibliography according to the author includes all the important papers 

 and books written on Arbacia punctulata (and also many on other sea urchins) 

 from about 1850 until 1954. It covers 50 pages of small print. 



The original photographic illustrative material is brought together in the 

 form of plates. The total number of photographs is 245. Their reproduction is 

 excellent, as are the typography and lay-out of the book as a whole. 



"EXPERIMENTELLE ZELLFORSCHUNG. 

 Hinweise auf ihre wichtigsten Aufgaben" . 

 3rd edition. 1956 



by E. Kiister V.E.B. Gustav Fischer Verlag, Jena 



73 pp. Price: D.M. 6.20 (sewn) 



The contents of this booklet by the deceased German plant cytologist, 

 author of ,,Die Pflanzenzelle", are sufficiently characterized by the title. The 

 first edition appeared in 1947; the present edition has been brought up to date 

 by the author's wife from the author's own notes. 



It must be stressed that the author keeps almost exclusively to the botanical 

 side of the problems throughout the booklet, a fact which is also evident from 

 the author-index. 



"BIOLOGY OF THE LABORATORY MOUSE" 

 1956 



by the Staff of the "^'VlJiflii *, f [;I Dover Publications, Inc. 

 Roscoe B. Jackson Mem. Lab. New York 



(editor: G. D. Snell) Price: $ 6.— 



497 pp. with 172 figs 



This is an unaltered reprint of the first edition of 1941 (Blakiston Com- 

 pany). Therefore, it is perhaps superfluous to mention that the book contains 

 two chapters of particular significance! to embryologists, viz. "The early em- 

 bryology of the mouse", and ,. Reproduction", both by G. D. Snell. Also of 

 interest is a list of gene and chromosome mutations. 



That the book has been reprinted without alteration implies that no literature 

 of the last sixteen years has been incorporated. 



The book has been well printed, but unfortunately the numerous photo- 

 micrographs have not been reproduced very well, which considerably reduces 

 their value. This does not hold for the beautiful line drawings. 



218 



