. Biological lectures delivered at the Marine Biological Laboratory of Wood's Holl [sic]. Biology. THIRD LECTURE. ON SOME FACTS AND PRINCIPLES OF PHYSIO- LOGICAL MORPHOLOGY. JACQUES LOEB. In this address I shall give a short account of a series of experiments which were undertaken in order to determine the causes of animal forms. Some of the results of these investigations have already been published.^ Among others, which are new, are experiments upon the artificial production of double and multiple monstrosities from one ovum in the ^>^ I. Heteromorphosis. If we look at an ani
. Biological lectures delivered at the Marine Biological Laboratory of Wood's Holl [sic]. Biology. THIRD LECTURE. ON SOME FACTS AND PRINCIPLES OF PHYSIO- LOGICAL MORPHOLOGY. JACQUES LOEB. In this address I shall give a short account of a series of experiments which were undertaken in order to determine the causes of animal forms. Some of the results of these investigations have already been published.^ Among others, which are new, are experiments upon the artificial production of double and multiple monstrosities from one ovum in the ^>^ I. Heteromorphosis. If we look at an animal we perceive that its various organs are arranged in a definite way. From our shoulders originate arms, and from our hips legs, but we never see that legs grow out from the shoulders or arms from the hips. In the lower animals there exists the same definite arrangement of parts. Fio-. I is a diagram of a hydroid Antennularia, which is pretty common at Naples. From a bundle of roots or stolons a perfectly straight stem arises to a height of six inches or more. From this main stem originate, in regular suc- cession, very short and slender branches, which carry polyps on their upper sides. In this case we never find that a root originates at the apex, or in the place of a branch, or that polyps originate at the lower side of a branch. 1 Untersuchungen ziir physiologischen Morphologie der Thieve. I, Heteromor- phosis, Wiirzburg, 1S91. II, Organbildung und Wachsthum, Wiirzburg, 1S92. 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 Marine Biological Laboratory (Woods Hole, Mass. ). Boston, Ginn & Co
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