Additions and Corrections to the Sixth Edition

NUMEROUS small corrections have been made in the last and present editions on various subjects, according as the evidence has become somewhat stronger or weaker. The more important corrections and some additions in the present volume are tabulated on the following page, for the convenience of those interested in the subject, and who possess the fifth edition. The second edition was little more than a reprint of the first. The third edition was largely corrected and added to, and the fourth and fifth still more largely. As copies of the present work will be sent abroad, it may be of use if I specify the state of the foreign editions. The third French and second German editions were from the third English, with some few of the additions given in the fourth edition. A new fourth French edition has been translated by Colonel Moulinie; of which the first half is from the fifth English, and the latter half from the present edition. A third German edition, under the superintendence of Professor Victor Carus, was from the fourth English edition; a fifth is now preparing by the same author from the present volume. The second American edition was from the English second, with a [x] few of the additions given in the third; and a third American edition has been printed from the fifth English edition. The Italian is from the third, the Dutch and three Russian editions from the second English edition, and the Swedish from the fifth English edition.

Fifth Edition
Sixth Edition
vol. i
Chief Additions and Corrections
100 106 Influence of fortuitous destruction on natural selection.
158 156 On the convergence of specific forms.
220 221 Account of the Ground-Woodpecker of La Plata modified
225 227 On the modification of the eye
230 233 Transitions through the acceleration or retardation of the period of reproduction.
231 234 The account of the electric organ of fishes added to.
233 237 Analogical resemblance between the eyes of Cephalopods and Vertebrates.
234 239 Clapar¸de on the analogical resemblance of the hair-claspers of the Acaridae
248 254 The probable use of the rattle to the Rattle-snake.
248 254 Helmholtz on the imperfection of the human eye
255 262 The first part of this new chapter consists of portions, in a much modified state, taken from chap. iv. of the former editions. The latter and larger part is new, and relates chiefly to the supposed incompetency of natural selection to account for the incipient stages of useful structures. There is also a discussion on the causes which prevent in many eases the acquisition through natural selection of useful structures. Lastly reasons are given for disbelieving in great and sudden modifications Gradations of character, often accompanied by changes of function, are likewise here incidentally considered.
268 333 The statement with respect to young cuckoos ejecting their foster-brothers confirmed.
270 334 On the cuckoo-like habits of the Molothrus.
Fifth Edition
Sixth Edition
vol. ii
Chief Additions and Corrections.
307 9. On fertile hybrid moths.
819 22 The discussion on the fertility of hybrids not having been acquired through natural selection condensed and modified.[xi]
326 28 On the causes of sterility of hybrids, added to and corrected.
377 81 Pyrgoma found in the chalk.
402 107 Extinct forms serving to connect existing groups.
440 148 On earth adhering to the feet of migratory birds.
463 172 On the wide geographical range of a species of Galaxias, a fresh-water fish.
505 218 Diseussion on analogical resemblances, enlarged and modified.
516 232 Homological structure of the feet of certain marsupial animals
518 236 On serial homologies, corrected.
520 237 Mr. E. Ray Lankester on morphology.
521 240 On the asexual reproduction of Chironomus.
541 262 On the origin of rudimentary parts, corrected.
547 262 Recapitulation on the sterility of hybrids, corrected.
552 275 Reeapitulation on the absence of fossils beneath the Cambrian system, corrected.
668 293 Natural selection not the exclusive agency in the modification of species, as always maintained in this work.
672 297 The belief in the separate creation of species generally held by naturalists, until a recent period.