ADDITIONS AND CORRECTIONS 9 



Chief Additions and Corrections. 



Pyrgoma found in the chalk. 



Extinct forms serving to connect existing groups. 



On earth adhering to the feet of migratory birds. 



On the wide geographical range of a species of Galaxias, 

 a fresh-water fish. 

 505 226 Discussion on analogical resemblances, enlarged and 



modified. 

 516 241 Homological structure of the feet of certain marsupial 



animals. 



On serial homologies, corrected. 



Mr. E. Ray Lankester on morphology. 



On the asexual reproduction of Chironomus. 



On the origin of rudimentary parts, corrected. 



Recapitulation on the sterility of hybrids, corrected. 



Recapitulation on the absence of fossils beneath the Cam- 

 brian system, corrected. 



Natural selection not the exclusive agency in the modifica- 

 tion of species, as always maintained in this work. 



The belief in the separate creation of species generally 

 held by naturalists, until a recent period. 



