. The doctrine of descent and Darwinism. Evolution. FORMS ALLIED TO AMMONITES. 217 advantage which would be established by selection. If other palaeontologists consider the fluctuations of form accompanying the relaxation of the closed spiral as evinc- ing the decline of the group, no contradiction seems to be imphed, for what was originally used as an ad- vantage by natural selection, proved injurious in its con- sequences. As we have seen, the earliest states are obliterated to. such a degree by curtailment of development that the indication of the nature of the progenitors continually dimin
. The doctrine of descent and Darwinism. Evolution. FORMS ALLIED TO AMMONITES. 217 advantage which would be established by selection. If other palaeontologists consider the fluctuations of form accompanying the relaxation of the closed spiral as evinc- ing the decline of the group, no contradiction seems to be imphed, for what was originally used as an ad- vantage by natural selection, proved injurious in its con- sequences. As we have seen, the earliest states are obliterated to. such a degree by curtailment of development that the indication of the nature of the progenitors continually diminishes. But our theory necessarily leads to the conviction that the families within which we have as yet been able to compare Ontogenesis with Phylogenesis, constantly approximate in their origin, and vindicate the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Schmidt, Dr. (Eduard Oskar), 1823-1886. New York, Appleton
Size: 1473px × 1697px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorschmidtdreduardoskar1, bookcentury1900, bookdecade1900
