emphasis is on the localization and activity of lysosomal acid hydrolases and 

 on the role of thyroxin. Experiments were also performed with inhibitors of 

 protein synthesis. 



The investigation was performed at the Laboratory of Physiological Che- 

 mistry. University of Louvain. 



20 DIE VERWANDLUNG DER INSEKTEN 



1969 

 by M. Fischer Walter de Gruyter & Co. 



Handbuch der Zoologie, Berlin 



IV. Band, 2. Halfte, Teil 1, Beitr. 16 Price: DM 34.— 



68 pp., 63 figs, 

 (paper-bound) 



This is a useful survey of insect metamorphosis written mainly from the 

 view-point of morphology and general biology. Completeness is of course 

 impossible in just over 50 pages of text. The most useful parts are those 

 covering the morphology of larval development and metamorphosis (both 

 external and internal), and those on polymorphism with reference to season, 

 sex, social differentiation, and generation cycle. They provide a good picture 

 of the enormous variety of postembryonic developmental patterns in insects. 



An attempt was made also to cover the causal aspects of larval develop- 

 ment and metamorphosis, particularly endocrine regulation. This part is less 

 satisfactory because it is far from complete. Particularly the sections on deter- 

 mination and regeneration are very sketchy. No mention is made of the exten- 

 sive experimental data on imaginal disks and on morphogenetic gradients in 

 the insect cuticle. 



An important feature of the issue is the bibliography of over 400 titles, 

 which is up-to-date until 1967. There is also an index of taxonomic names. The 

 illustrations consist of good line drawings. 



21 DEVELOPMENT OF STURGEONS 



Oocyte Maturation, Fertilization 



and Embryogenesis 



1969 



by A. S. Ginsburg and T. A. Dcttlaff Publishing House ,,Nauka" 



134 pp., 67 figs. Moscow 



This monograph is written in Russian and is announced only briefly. The 

 contents are sufficiently characterized by the title. 



The book is illustrated mainly with good line drawings, the majoritv of 

 which constitute a 36-stage Normal Table of Acipenser qiildenstadti. The 

 bibliography consists mainly of Russian titles (more than 100). 



22 MAMMALIAN FERTILIZATION 



An atlas of ultrastructure 



1969 



by R. Hadek Academic Press 



307 pp., 152 figs. New York - London 



SBN 12 312950 8 

 Price: $ 14.50: 135 s. 



Contents: I. The mammalian spermatozoon: II. The vaginal plug; III. From oocyte to zygote; 

 IV. The functional aspects of granulosa cell ultrastructure; V. Experiments; VI. Discussion 



It is difficult foi a non-specialist to review a highly specialized work like 

 this. However, a specialist has assured us that it is incomplete in its presen- 

 tation of the dynamic process of fertilization. This may be due to the fact that 



21 



