Plates 16–19.

<p><b>A, B</b>, plate 16; <b>C, D</b>, plate 17; <b>E, F</b>, plate 18; <b>G, H</b>, plate 19 in <b>A, C, E, G</b>, left lateral and <b>B, D, F, H</b>, right lateral views. Scale bar equal to 10 cm.</p>