. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. BIGELOW: COAST WATER EXPLORATION OF 1913. 309 The stolon commonly runs along its support nearly in a straight line and it never forms a very complicated network. From the stolon the individual zooids arise, the pedicel being usually rather rigidly erect. In the Grampus material there are hundreds of colonies all of them entirely removed from their support. I say "removed" because one can scarcely conceive of a planula settling down to form a hydroid colony unless it had something on which to settle. As the s
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. BIGELOW: COAST WATER EXPLORATION OF 1913. 309 The stolon commonly runs along its support nearly in a straight line and it never forms a very complicated network. From the stolon the individual zooids arise, the pedicel being usually rather rigidly erect. In the Grampus material there are hundreds of colonies all of them entirely removed from their support. I say "removed" because one can scarcely conceive of a planula settling down to form a hydroid colony unless it had something on which to settle. As the stolons adhere quite closely to their means of support, they must have been. Fig. 73.— Clytia cylindrica. torn away with some violence so that the stolons were broken in pieces as well. This separation and setting adrift produced complications, to the results of which reference must now be made. With the first glance at a mass of this material one is immediately impressed with the fact that there are very few free stolon ends. In colonies collected under ordinary conditions, we can usually see the growing ends of the stolons. Here there seems to be nothing of the kind except in very rare instances. What has happened to them? Again one would suppose that when the colonies were torn away there. 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
Size: 1628px × 1535px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1915
