Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 880
ngles of which areprolonged into four slender processes (g, </, g, g), shorter than the fourouter legs, but furnished with a similar calcareous framework. The first indication of the production of the young Echinus fromits pluteus is given by the formation of a circular disc (fig. 626.A, c) on… … feet of the adult. The disc gradually extends itself over the stomach,and between its tubules the rudiments of spines are seen to protrude(D): these, with the tubules, increase in length, so as to project againstthe envelope of the pluteus, and to push themselves through it; whilst,at the same…
Microscopy
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