Species

122 Species definitions of sets.^31 A species in the older logic had to be definable from the larger genus. A set, however, coul ...

The Nineteenth Century, a Period of Change 123 singularities; and we move upwards through the essences of genus and species to a ...

124 Species Let us first see what is meant by the name of species. Any collection of like individuals which were produced by oth ...

The Nineteenth Century, a Period of Change 125 held that fossil species merely transformed into later forms.^49 Gillispie notes ...

126 Species Some of Lamarck’s transformist views on species had been championed by Etienne Geoffroy Saint-Hilaire (1772–1844), I ...

The Nineteenth Century, a Period of Change 127 Baron Cuvier: Fixed Forms and Catastrophes Lamarck’s (and later Geoffroy’s) nemes ...

128 Species generated in some manner at the time of a catastrophe, and previous forms were obliterated. Nordenskiöld writes The ...

The Nineteenth Century, a Period of Change 129 I do not pretend that a new creation was required for calling our present races o ...

130 Species conclude, that the tribes thus distinguished have not descended from the same original stock. This is the purport of ...

The Nineteenth Century, a Period of Change 131 “species” of Man: Caucasian, Arctic, Mongol, American Indian, Negro, Hottentot, M ...

132 Species and sexual preference enables a biological species to be recognized. His answer was, its mode of reproduction and gr ...

The Nineteenth Century, a Period of Change 133 All the more comprehensive groups, equally with Species, are based upon a posi- t ...

134 Species All the observations relative to domestic animals, among which there are so many and so numerous variations, again d ...

The Nineteenth Century, a Period of Change 135 James Dana: A Law of Creation But Agassiz was not alone in pressing the Cuvierian ...

136 Species knowledge of the complete type requires knowing all these and how they relate to external circumstances. There is a ...

The Nineteenth Century, a Period of Change 137 as observation has reached; and that they are not due to domestication or to arti ...

138 Species Other Fixist Views The view that species were fixed as they had been created was held religiously (in the strict sen ...

The Nineteenth Century, a Period of Change 139 Christians alike looked at it, and laughed, and threw it away.”^112 It is hard no ...

140 Species 3dly. Some acquired peculiarities of form, structure, and instinct, are transmissible to the offspring; but these co ...

The Nineteenth Century, a Period of Change 141 There are fixed limits beyond which the descendants from common parents can never ...