“What can be more curious than that the hand of a man, formed for grasping, that of a mole for digging, the leg of the horse, the paddle of the porpoise, and the wing of the bat, should all be constructed on the same pattern, and should include the same bones, in the same relative positions? … Hence the same names can be given to the homologous bones in widely different animals. We see the same great law in the construction of the mouths of insects: what can be more different than the immensely long spiral proboscis of a sphinx-moth, the curious folded one of a bee or bug, and the great jaws of a beetle?—yet all these organs, serving for such different purposes, are formed by infinitely numerous modifications of an upper lip, mandibles, and two pairs of maxillæ. Analogous laws govern the construction of the mouths and limbs of crustaceans. So it is with the flowers of plants. Nothing can be more hopeless than to attempt to explain this similarity of pattern in members of the same class, by utility or by the doctrine of final causes.”
Source: On the Origin of Species (1859), chapter XIII: "Mutual Affinities of Organic Beings: Morphology: Embryology: Rudimentary Organs", pages 434-435 http://darwin-online.org.uk/content/frameset?pageseq=452&itemID=F373&viewtype=image
Help us to complete the source, original and additional information
Charles Darwin 161
British naturalist, author of "On the origin of species, by… 1809–1882Related quotes

Travis Parker, Chapter 8, p. 102-103
2000s, The Choice (2007)

Reflections on Various Subjects (1665–1678), VII. On Air and Manner

Source: Flatland: A Romance of Many Dimensions (1884), PART I: THIS WORLD, Chapter 5. Of Our Methods of Recognizing One Another
Context: p>You, who are blessed with shade as well as light, you, who are gifted with two eyes, endowed with a knowledge of perspective, and charmed with the enjoyment of various colours, you, who can actually SEE an angle, and contemplate the complete circumference of a circle in the happy region of the Three Dimensions — how shall I make clear to you the extreme difficulty which we in Flatland experience in recognizing one another's configuration?Recall what I told you above. All beings in Flatland, animate or inanimate, no matter what their form, present TO OUR VIEW the same, or nearly the same, appearance, viz. that of a straight Line. How then can one be distinguished from another, where all appear the same?</p
As cited in: Derek Austin (1977) "Perspective paper: Library Science" in: Donald E. Walker et al. eds. Natural language in information science. p. 48
Classification and indexing in the social sciences (1963)

Book I, Chapter 6
The History of Tom Jones (1749)