. Cephalopoda. Cephalopoda. Homologues are those components of different similar complex entities which show a similar coordination* to other parts of the same- entities. This is true of typical as well as geometrical similarities but in the latter a correlation can be expressed more exactly as a numerical pro- portion. The analogy between typical and geometrical similarity can be taken even further. If two triangles have two equal angles, the wholes are similar — if organisms have typically similar parts, the wholes are similar. This is essential for the interpretation of fossils and, consequ
. Cephalopoda. Cephalopoda. Homologues are those components of different similar complex entities which show a similar coordination* to other parts of the same- entities. This is true of typical as well as geometrical similarities but in the latter a correlation can be expressed more exactly as a numerical pro- portion. The analogy between typical and geometrical similarity can be taken even further. If two triangles have two equal angles, the wholes are similar — if organisms have typically similar parts, the wholes are similar. This is essential for the interpretation of fossils and, consequently, to paleontology as a whole. Fossils are not complete organisms, but only fragments which require reconstruction to be fully understood. This is done according to the principle of typical correlation, i. e. the experience that typically similar parts belong to typically similar entities. The natural system will be the foundation, as will be shown in the special part. The problems connected with the fitting of the parts into a whole are only outlined here; a more detailed discussion is not necessary at this FIGURE 1. Analogy between geometric and typical similarity. The whole quadrangles are "similar," their parts "; Compare the sides (a and ai),the angles (6 and Pj), the points along the sides (x and x^), or those occupying a certain position in the interior (y and y^). Organic life presents a multitude of typically similar forms the abstract (systematic) association of which requires a common standard, a "tertium comparationis" (Goethe). Careful analysis of the morphological variety suggests that there should be an ideal form to which the individual forms would be related like the "single cases to the general law" (Goethe), that is, the ideal form should to some extent be the expression of not recognized objective necessities. This ideal form is the type. The question is how this ideal form is suitable for a ce
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Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectcephalopoda
