. Animal life as affected by the natural conditions of existence. Animal ecology. TEANSFORMATION OF A CErSTACEAN. 157 success, for he- brought Artemia Milhauaenii back to Artemia salima by breeding successive generations in salt water which he made weaker and weaker. Now the differences between the two species are so great that no zoologist had previously cast any doubt on the accuracy of classing them as two species,. Fig. 42.—Transformation of Artemia salina to A. Milliausmti. 1, tail-lobe of A. mlina and its transition through 2,3, 4, 5, to ii, into that of A. MWtausenii. 7, postabdomen of
. Animal life as affected by the natural conditions of existence. Animal ecology. TEANSFORMATION OF A CErSTACEAN. 157 success, for he- brought Artemia Milhauaenii back to Artemia salima by breeding successive generations in salt water which he made weaker and weaker. Now the differences between the two species are so great that no zoologist had previously cast any doubt on the accuracy of classing them as two species,. Fig. 42.—Transformation of Artemia salina to A. Milliausmti. 1, tail-lobe of A. mlina and its transition through 2,3, 4, 5, to ii, into that of A. MWtausenii. 7, postabdomen of A. salina \ 8, postabdomen of a form bred in slightly salt water; 9, gill of A. MiVtausenii; 10, gill of A, salina. From Schmankewitsch. and with all the more reason because each seemed to exclude the other; Schmankewitsch's experiment has nevertheless proved their relationship, and also explains very simply the fact that they never occur together. It is merely the constancy of the external conditions of life—the greater or less saltness of 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 Semper, C. (Carl), 1832-1893. New York, D. Appleton
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