Plate, figure 1 showing portions of four plates with soldering particles by Tuffen West and [Henry] Hyde Salter Figure 1 from plate VIII showing portions of four plates from an echinus tooth studded with 'soldering particles'. Subject: Zoology / Physiology Published in Philosophical Transactions as 'On the structure and growth of the tooth of echinus'. Received by the Royal Society on 5 March 1861. Read 21 March 1861. [1861]