Unique features of the present work include: • Only authorized English translation of the original Spanish text, adhering as much as possible to the letter, with correction of the obvious errors already predicted by Cajal in his Preface. • Added facts appearing in the French version, with correction of old as well as new errors, the latter probably due to inaccuracies in translating into French some nuances of the Spanish language. • Uniform of nomenclature according to contemporary scientific English. • Annotations on Cajal’s changing concepts over time, the elucidation of certain structures that do not have present day equivalents, and explanations of the many symbols appearing in illustrations but not mentioned in the corresponding original legends. • Most illustrations are reproductions of Cajal’s original art work, still extant at the Cajal Museum in Madrid, with cross references to figure numbers of the Spanish and French versions. • Citations are given by author and year in the text, with an alphabetical list at the end of the volume, completed and corrected for accuracy against original publications. • Taxonomy glossary of species appearing in the text, with present scientific names, and their colloquial English counterparts. weiterlesen