. Analysis of development. Embryology; Embryology. Metamorphosis 645. Fig. 226. Above, A chain of six brainless diapausing pupae had been established in parabiosis and a single chilled pupal brain implanted under the facial window of the anterior-most individual. When pupae 1 and 2 showed the initiation of development, about 17 days later, pupae i and 6 were detached as seen above. Below, The same preparation seven weeks later. After detachment of the brain- containing pupa, the activation has continued to spread down the chain of interconnected pupae. The isolated pupa, however, failed to dev
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. Analysis of development. Embryology; Embryology. Metamorphosis 645. Fig. 226. Above, A chain of six brainless diapausing pupae had been established in parabiosis and a single chilled pupal brain implanted under the facial window of the anterior-most individual. When pupae 1 and 2 showed the initiation of development, about 17 days later, pupae i and 6 were detached as seen above. Below, The same preparation seven weeks later. After detachment of the brain- containing pupa, the activation has continued to spread down the chain of interconnected pupae. The isolated pupa, however, failed to develop. (After Williams, '52.). 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 work.. Willier, Benjamin H. (Benjamin Harrison), b. 1890. Philadelphia, Saunders