of the tumour as a whole. The authorship of the book is truly 

 international, and the chapters are well integrated. 



The book opens with two excellent reviews of tissue interac- 

 tions in embryogenesis and morphogenesis by Kratochwil and 

 Saxen, respectively. Tarin briefly reviews tissue interactions 

 in adult organs. The next five chapters present histological 

 and ultrastructural studies on human and experimentally induced 

 animal neoplasms, while five other chapters discuss biochemical 

 and transplantation studies on the mechanisms of carcinogenesis 

 and invasion. Systemic effects are excluded from consideration. 

 In the final chapter Cowell discusses the control of epithelial 

 invasion by connective tissue during egg implantation. 



The book is well produced and very well illustrated. 



Symposium reports 



60. 



B.SCHWEINITZ and R.DEHNCKE, eds. of journal. 1972. PATHOPHYSIC- 



LOGIE DER FETALEN UND NEONATALEN ENTWICKLUNG 



Friedrich-Schlller Univ., Jena. Wiss. Z. Friedr. -Schiller Univ.. 



Math.-Naturwiss. Reihe. Vol.21, pt . 4 . 251 pp., 133 figs., 51 



tabs . 



This is the report of a Symposium held in Jena (DDR) some 

 time during 1971. It contains 56 brief research reports by au- 

 thors from East Germany and various other Eastern-European coun- 

 tries (and a few from West Germany). The subjects of most of 

 the papers fall under one of the following categories: biochem- 

 istry, physiology, and endocrinology of the fetus and neonate; 

 structural and functional studies of the placenta, feto-placen- 

 tal unit, and embryonic membranes; clinical studies on the human 

 fetus and neonate; immunological and immunochemical studies. 

 Five contributions from outside Germany are in English. 



REGENERATION, RENEWAL (see also 27,80,93) 



Textbooks 



61. 



M. SINGER. 1973. LIMB REGENERATION IN THE VERTEBRATES 

 Addison-Wesley , Reading, Mass. Addison-Wesley Module in Biology 

 Nr.6. 27 pp., 17 figs., 1 tab. 



Although of course highly selective, this is on the whole a 

 competent and readable review, with one exception: the section 

 on morphogenesis of the regenerate is too incomplete to serve 

 its purpose. Whereas at least some of the most important modern 

 work is mentioned in the other sections, in this section the 

 most recent work is almost totally neglected. 



With a concise text of this type more illustrations, particu- 

 larly summarizing diagrams, would have been useful. The selec- 

 tion of references is sometimes odd. 



Monographs 



62. 



P.BRIEN. 1971. REGENERATION D ' UN ASCIDIOZOIDE DE CLAVELINA LEPA- 

 DIFORMIS MULLER PAR UN FRAGMENT DE STOLON ET PAR UN THORAX ISOLE 

 Acad. Royale de Belgique, Bruxelles. Mem. Acad. Roy. Belg. CI. 

 Sci. Coll. 8 , Ser.2, 39, 6, 92 pp., 50 figs. 



Morphological and histological study of the regeneration of the 

 210 



