plasm, not in the nucleus. He further extensively discusses the possible mech- 

 anisms for such control. 



The book is very well produced and has excellent photographic plates. It is 

 concluded by author and subject indexes. 



4 ADVANCES IN REPRODUCTIVE PHYSIOLOGY 



Vol. 1, 1966 



Editor: A. McLaren Logos Press 



295 pp., 26 figs., 18 pis., 19 tbs. Academic Press 



London - New York 

 Price: $ 12.50; 100 s. 



Contributors: Biggers (Philadelphia, Pa.), Blackler (Ithaca, N.Y.), Bland (London), Dawkins 

 (London), Donovan (London), Hancock (Edinburgh), Jacobs (Edinburgh), Lake (Edinburgh), 

 McFeely (Philadelphia, Pa.), Venning (High Wycombe, Bucks.), Whitten (Canberra) 



This book is the first in a new series of review volumes to be published anually. 

 As with other "Advances" series the choice of topics is such as to provide some- 

 thing of interest for everyone working in the field as a whole, with no attempt 

 to concentrate on specific sub-fields. In the present volume this results in an 

 extreme variety of subjects. 



The only truly embryological contribution is that by Blackler on embryonic 

 sex eels of amphibia. Further reviews that may be of interest to developmental 

 biologists are those on intersexuality in domestic mammals (Biggers and 

 McFeely), on the ultrastructure of mammalian spermatozoa (Hancock), on the 

 uterus and the control of ovarian function (Bland and Donovan), and on the 

 hazards of birth (Dawkins). 



All reviews are well-organized and -illustrated, and have extensive biblio- 

 graphies. The book has no indexes. 



5 SEX CHROMOSOMES 



1967 



By U. Mittwoch Academic Press 



315 pp., 69 figs., 4 tbs. New York - London 



Price: $ 14.—; 112 s. 



This is one of the three important books recently written on the chromosomal 

 basis of sex. The other two, by G. Bacci (1966) and by S. Ohno (1967), were 

 reviewed in the twelfth main issue of "General Embryological Information 

 Service" (1967, p. 270 and 271 respectively). Among the three, the present one 

 is undoubtedly suited best as an introduction into the field for students and non- 

 specialists, partly because it follows the historical approach. The treatment is 

 selective rather than exhaustive, and the scope is intermediate between that of 

 an exhaustive book like Bacci's, and the type of research monograph provided 

 by Ohno. 



The book is opened by two elementary chapters on the chromosomal basis of 

 sex determination, and on mitosis, meiosis, and the formation of gametes. Then 

 follow seven chapters discussing sex chromosomes in plants and in a variety of 

 animal forms, ranging from insects through lower and higher vertebrates to man. 



H 



