. Echinoderms of Connecticut . FlG> 5' Free-swimming larva (Brachio- Iaria> °f starfish' The stippled areas in the central and the body which will remain lower parts of the figure indicate the posi- after the transformation to tion of the digestive tract, the mouth be- the adult stage. Compare ing shown at the left-hand edge of the Figs. 5 and 6. figure, with the intestinal opening below. 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 se
. Echinoderms of Connecticut . FlG> 5' Free-swimming larva (Brachio- Iaria> °f starfish' The stippled areas in the central and the body which will remain lower parts of the figure indicate the posi- after the transformation to tion of the digestive tract, the mouth be- the adult stage. Compare ing shown at the left-hand edge of the Figs. 5 and 6. figure, with the intestinal opening below. 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. 1 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 1899.
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherhartf, bookyear1912
