. Echinoderms of Connecticut. Echinodermata. 54 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. is now some fifty times as large as the original embryo. It is now ready for the Fig. S- Free-swimming larva (Bradiio- laria) of starfish. (After Mead.) The stippled areas in the central and lower parts of the figure indicate the posi- tion of the digestive tract, the mouth be- ing shown at the left-hand edge of the figure, with the intestinal opening below. Fig. 4- Free-swimming larva (Brachiolaria) of starfish. (After Weysse.) The wavy disk-like area at the lower end of figure repre
. Echinoderms of Connecticut. Echinodermata. 54 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. is now some fifty times as large as the original embryo. It is now ready for the Fig. S- Free-swimming larva (Bradiio- laria) of starfish. (After Mead.) The stippled areas in the central and lower parts of the figure indicate the posi- tion of the digestive tract, the mouth be- ing shown at the left-hand edge of the figure, with the intestinal opening below. Fig. 4- Free-swimming larva (Brachiolaria) of starfish. (After Weysse.) The wavy disk-like area at the lower end of figure represents the portion of the body which will remain after the transformation to the adult stage. Compare Figs, s and 6. The external changes by which the metamorphosis is ac- complished, and the habits of the young starfish, are described by Mead* as follows: "Already the rudiment of the resulting starfish can be seen within the brachiolarian. The five crenate lobes on the margin of the disk are the beginning of the five arms. The disk itself at this time is already somewhat opaque. " When the larva is about to ' set,' it attaches itself to some object, like a spear of eelgrass, by the suckers, shown at the top of the figure (Figs. 4 and 5), and then a rapid transformation * Bull. U. S. Fish Commission for 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 Coe, Wesley Roswell, 1869-. Hartford, Printed for the State Geological and Natural History Survey
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