epithelial attachment following gingivectomy in monkeys, probably 



by regeneration from oral epithelium. 



To Indicate the wider biological significance of this study we 



quote a paragraph from the concluding remarks: 



The region of the epithelial attachment to teeth is of partic- 

 ular biological interest as it represents a rare example of a 

 basement lamina arising between two ectodermally derived tis- 

 sues, namely the enamel and the junctional epithelium. This 

 provides further supporting evidence for the epithelial nature 

 of basement laminas . Furthermore, the ultrastructural charac- 

 teristics of ameloblasts indicate that these cells are capable 

 of undergoing additional cytological transformations to those 

 which have been, heretofore, associated with this cell. 



The book is illustrated with excellent drawings, electron mi- 

 crographs, and phase contrast micrographs. It has an 11-page bib- 

 liography. 



37. 



A.E.SHER. 1971. THE EMBRYONIC AND POSTNATAL DEVELOPMENT OF THE 



INNER EAR OF THE MOUSE 



Almqvist & Wiksell, Stockholm. Acta Oto-Laryngol . Suppl.285. 



77 pp., 2 graphs, 24 pis., 4 tabs. 



Day-by-day histological study from 11th day of gestation till 

 10th day after birth; development of otic labyrinth, scala ves- 

 tibuli and scala tympani; innervation of vestibular apparatus 

 and cochlear duct; tabular surveys of the development of 17 dif- 

 ferent structures; 93 good photomicrographs. 



38. 



N.M.SHERWOOD and P.S.TIMIRAS. 1970. A STEREOTAXIC ATLAS OF THE 



DEVELOPING RAT BRAIN 



Univ. of Calif. Press, Berkeley, etc. VI, 209 pp., 4 figs., 189 pis. 



$ 25.00, £ 11.90 



The bulk of this book consists of three series of photographs 

 of sections, and corresponding labelled drawings; the series re- 

 present the 10-day, the 21-day, and the 39-day old rat brain 

 respectively. Each series consists of 27 or 28 transverse sec- 

 tions and three parasagittal sections (the cerebellum and the 

 posterior part of the brain stem are not shown in the former and 

 not labelled in the latter sections). The sections of the young- 

 est stage are all stained with thlonin, while those of the older 

 stages are stained alternately with thlonin and Sudan black B, 

 to show nuclei and fibre tracts respectively. All the drawings 

 carry coordinates with reference to a horizontal zero plane just 

 below the base of the brain, and a vertical zero plane passing 

 through the interaural line. In the drawings a total of over 200 

 brain structures are labelled. 



The text consists of a brief introduction (which, among other 

 things, discusses the shifts in position of seven selected brain 

 structures with age), directions for the use of the atlas in 

 connection with stereotaxic studies, and a section giving details 

 of the preparation of the atlas. Summaries of the directions for 

 use are provided in English, German, and French. 



The book is very well produced. It is inconvenient thar, the in- 

 dex of Drain structures is arranged according to abbreviations 

 rather than to full names of structures, because now the latter 

 are not in alphabetical order. 



26 



