Footnotes and illustrations have been moved out of text paragraphs; some ditto marks have been replaced with the dittoed text.
The references to plates (for example those after page 130) have been standardised regarding the use of commas and italicised abbreviations.
Some minor typographical and punctuation errors have been corrected silently, as have some minor lay-out and typographical inconsistencies.
Page vii, items 10 and 11: captions of individual photographs have been added.
Page 3: repeated footnote marker [2] removed from last column of Caiman niger.
Page 51: ... skeleton of Tomistoma schlegali ... changed to ... skeleton of Tomistoma schlegeli ....
Page 72, caption with Fig. 24: supraangular changed to supra-angular.
Page 87, caption with Fig. 29: tb¹ changed to tb′ cf. illustration.
Page 107: entsprect changed to entsprecht.
Page 165: Gescmackwärzchen changed to Geschmackwärzchen.