classification by stages of embryonic development, a catalogue of the embryos present in 

 flie Carnegie collection, and a reference guide to important specimens in other labora- 

 tories. 



For the present work Streeter's original "horizons" were converted and supplemented 

 to yield a series of 23 stages designated with arabic numerals and covering the period up 

 to aboul 30 mm. CR length (about eight weeks). Part A covers the first nine stages (first 

 three weeks) while part B will treat the remaining ones. 



In part A each chapter deals with a particular stage, generally according to the 

 following format: a lengthy introduction giving much background information essential 

 for the interpretation of the specimens; specimens present in the Carnegie Collection 

 (tables): specimens whose description was already published elsehwere (both from the 

 Carnegie and other collections); additional specimens (usually provided with insufficient 

 measurements). 



The book is illustrated with excellent photographs, line drawings, and diagrams. It is a 

 pity that it could not be provided with a hard cover. 



REPRODUCTION, SEXUAL DEVELOPMENT, GAMETOGENESIS, FERTILIZATION 



(see also 50,56,73,79) 



Textbooks 



23. 



A.MONROY. 1973. FERTILIZATION AND ITS BIOCHEMICAL CONSEQUENCES 



Addison-Wesley, Reading, Mass. Addison-Wesley Module in Biology No. 7. 37 pp., 18 figs., 

 2 tabs. 



This is a well-written, well-illustrated review of the cell-biological and biochemical 

 aspects of fertilization. An important feature is that fertilization is placed in the context 

 of the events preceding and following it, i.e., oogenesis, egg maturation, and early 

 embryogenesis. The literature cited is extensive and up to date. 



Monographs 



24. 



S.SUZUKI. 1973. AN ATLAS OF MAMMALIAN OVA 



1st edit., 1973. Igaku Shoin, Tokyo 



2nd edit., 1974. Thieme, Stuttgart; Igaku Shoin, Tokyo 



XII, 139 pp., 130 figs. DM 128.-, Yen 9.900.- 



This atlas consists of a rather haphazard collection of black-and-white and colour 

 photographs and electron micrographs of mammalian ova and early embryos. The species 

 illustrated are man (follicular oocytes only), monkey (oocytes and ova only), rabbit, rat, 

 and mouse. The stages shown are follicular oocytes (many of them cultured), tubal ova 

 (unfertilized and in the process of fertilization), cleavage stages, and blastocysts. Some 

 electron micrographs of mouse tubal epithelium and some autoradiographs and chromo- 

 some pictures are also included. 



The text consists of a brief introduction (without references) highlighting some 

 features of early mammalian development, and brief accounts of the methodology of 

 (1) in vitro culture of human and monkey follicular oocytes, (2) fertilization of aged 

 rabbit ova, (3) in vitro fertilization of rabbit ova in tubal fluid, (4) autoradiography of 

 nucleic acid and protein synthesis in rat embryos, and (5) demonstration of chromosomes 

 in rabbit embryos; none of these have references, and none refer directly to the 

 illustrations. 



The illustrations are on the whole of very good quality (with the exception of most of 

 the electron micrographs), but the figure captions are grossly deficient. No magnifications 



178 



