levels of sectioning. An extensive Index and glossary identifies 

 and defines over 450 embryonic structures, and at the same time 

 provides a synopsis of their development. 



30. 



L.RAUNICH. 1972. EMBRIOLOGIA E MORFOGENESI. 2nd edit. 

 Azzoguidi, Bologna. XVI, 583 pp., 392 figs., 12 coloured pis. 

 L. 9000 (paper) 



That a second, enlarged edition of this book appears so soon 

 after the first (1970, see Gen.Embryol . Inf .Serv. Suppl.to vol.13, 

 1970, p. 15) shows that it fills an urgent need. The book is now 

 almost 140 pages longer and has many more illustrations. The 

 text has been improved wherever necessary, making use of the 

 suggestions of many of the author's colleagues. 



The major addition is a separate chapter on the general and 

 comparative embryology of the vertebrates, with a 44-page sec- 

 tion devoted specifically to human development. Other extensions 

 are in the areas of basic cytology and molecular biology, and 

 elementary developmental genetics. 



Many of the old illustrations have been regrouped or repro- 

 duced on a larger scale. Twelve very good coloured plates have 

 been added, which in graphical form summarize data on the pro- 

 spective maps, gastrulation movements, extra-embryonic membranes, 

 and placentation of the major vertebrate classes and mammalian 

 orders . 



31- 



B.H.SKOLD and E.KUNZEL. 1972. DAVIS EMBRYOLOGY LABORATORY GUIDE, 



48-hour chicken embryo and 10 -mm pig embryo 



Iowa State Univ. Press, Ames. X,227 pp., 175 figs., subject in- 

 dex. $ 14.50 



This atlas is based on a nearly complete manuscript by the 

 late Olive Stull Davis of Purdue University, finished and edited 

 by Skold and Kiinzel. Therefore, Dr. Davis should have been given 

 as the author. 



The atlas consists of photomicrographs of sections of the 48- 

 hour chick and 10 -mm pig embryo. Special features are (1) the 

 inclusion of a large number of sagittal sections in addition to 

 the transverse ones, and (2) the selection of sections to form 

 a more or less continuous picture (the levels shown are some- 

 times as close as every third section, sometimes much farther 

 apart). For the chick there are 47 transverse and 16 sagittal 

 sections; for the pig these figures are 8l and 31, respectively. 

 All photographs are fully labelled and accompanied by an ade- 

 quate explanatory text. , 



The photographs are no more than adequate. The majority are 

 too pale and have lost too much contrast in reproduction; some 

 seem to be out of focus. As a result several of the more minute 

 labelled structures are hardly discernible. Otherwise the book 

 is well produced. There are separate indexes to the pictures of 

 the two species. 



32. 



R.L.WATTERSON and R.M.SWEENEY. 1973. LABORATORY STUDIES OF 



CHICK, PIG, AND FROG EMBRYOS. 3rd edit. 



Burgess, Minneapolis. VIII, 205 pp., 19 figs., 38 pis., 4 tabs., 



subject index. $ 6.95 (spiral bound) 



The appearance of a third edition of this laboratory manual so 

 soon after the second (1970) testifies to its success. The basic 



198 



