Evolution; its nature, its evidences, and its relation to religious thought . Fig. 31.—Vibilia, an amphibod crustacean (after Milne Edwards). the ear is situated in the basal joint of the arteriorpair. Last of all, there is still another pair, jomted andmovable, on the ends of which are situated the last three, therefore, are sense-appendages. Some HOMOLOGIES OF THE ARTICULATE SKELETON. 139 writers make this last pair special organs, not homolo-gous with appendages. For the sake of greater distinctness, we give thewhole series of these appendages in one of the higherforms, viz., the
Evolution; its nature, its evidences, and its relation to religious thought . Fig. 31.—Vibilia, an amphibod crustacean (after Milne Edwards). the ear is situated in the basal joint of the arteriorpair. Last of all, there is still another pair, jomted andmovable, on the ends of which are situated the last three, therefore, are sense-appendages. Some HOMOLOGIES OF THE ARTICULATE SKELETON. 139 writers make this last pair special organs, not homolo-gous with appendages. For the sake of greater distinctness, we give thewhole series of these appendages in one of the higherforms, viz., the prawn (Palemon, Fig. 29, and in one ofthe lower forms, Nebalia, Fig. 30).. Fig. 32.—Lithobius forcipatus (after Carpenter). That these are really homologous parts is furthershown by the fact that in the case of other crustaceans,such as limulus, the same appendages, i. e., the append-ages of the same body segments, which in the cases be-fore mentioned are used as feet, become swimmers, whilethe appendages corresponding to jaw-feet become walk-ers ; and even what corresponds to antennae or sense-appendages, may, as in branchippus, become powerfulclaspers. Finally, in all the lowest crustaceans, theidentity is evident, because all the segments and theirappendages are much alike in form and function (). We have taken examples from near the middle of thearticulate scale, because, as already stated, both the essen-tial identity and the adaptive modifications are easily 140 EVIDENCES OF THE TRUTH OF EVOLUTION. traced. If we go downward in the scale, the structurebecomes more and more generalized, and the rings andappendages become more and more alike (Fig.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectreligion, bookyear192
