PLATE VI. 
Fig. 1. P solus antarcticus, Philippi, Deposits from the sole. 
Fig. 2. P solus squamatus, Diiben and Keren, var. Deposits from the sole. 
Fig. 3. Psolus ephijppifer, Wyv. Thomson, a, transverse section of the saddle-hke 
elevation of the dorsal perisome, showing the cloister-like space between 
the columns; h, deposits from the sole; c, calcareous ring. 
Fig. 4, Psolus murrayi, n. sp, a, plates from the sole ; h, cups from the sole. 
Fig. 5, Psolus incertus, n. sp. a, a scale with pores, x ; h, deposits from the sole. 
Fig. 6. Colochirus australis, Ludwig, a, buttons ; h, a cup ; c, supporting rods from 
the pedicels ; d, piece of the skin with two pedicels. 
Fig. 7. Colochirus quadrangularis, Lesson, a, a spherical, reticulate body ; 6, diverse 
views of cups ; c, supporting rod from the pedicels ; d, flat cups from the 
pedicels. 
Fig. 8. Colochirus inornatus, von Marenzeller, a, diverse forms of cups from the 
exterior layer of the perisome ; h, button. 
Fig. 9, Colochirus cucumis, Semper, a, large reticulate spheres ; h, small reticulate 
spheres ; c, cups or hemispheres. 
Fig. 10 . Ocnus typicus, n. sp. a, knobbed, buttons ; 6, dichotomously branched bodies 
or rosettes. 
Fig. 11 . Colochirus challengeri, n. sp.* a, diverse forms of buttons; h, upper and under 
views of cups ; c, supporting rods of the dorsal pedicels ; d, calcareous ring, 
twice the natural size. 
Fig. 12. Colochirus spinosus, Quoy and Gaimard, a, cups; b and c, buttons. 
Fig. 13. Cucumaria Isevigata, Verrill (from Betsy Cove). Plates from the body-wall 
itself 
