. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Fig. 30. 6. Another division process is that of splitting of the mass. This is illnstrated by tlie case of the optic mass of the lobster (Figure 30), wliich splits into an outer and an inner part. Com- pare the origin of the nervous system of Peripatus, K. &: H., Fig. 442, B. 7. Under the second head, fusion of contiguous masses, we may place such cases as that of the union of indepen- dently arisen ganglionic masses, such as Mf)rgan describes for the Pantopod, Pal- lene (Figure 31). Fig. Fig. 30. Sections th
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Fig. 30. 6. Another division process is that of splitting of the mass. This is illnstrated by tlie case of the optic mass of the lobster (Figure 30), wliich splits into an outer and an inner part. Com- pare the origin of the nervous system of Peripatus, K. &: H., Fig. 442, B. 7. Under the second head, fusion of contiguous masses, we may place such cases as that of the union of indepen- dently arisen ganglionic masses, such as Mf)rgan describes for the Pantopod, Pal- lene (Figure 31). Fig. Fig. 30. Sections through three stnges in the development of the compound eye of the lobster after G. H. Parker. In B and C the mass is seen to be splitting into the retina and optic ganglion. See K. & H., Fig. 263. Fig. 31. Ventral part of sections across Pallene embryos. A, earlier stage, showing the paired neural invaginations ; B, later stage, ganglia fused. See K. & H., Figs. 409, 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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