PLATE II. 
Fig. 1. Chirodota purpurea, Lesson, a, wheel ; b, miliary granules. 
Fig. 2. Chirodota contorta, Ludwig, a, wheel ; b, sigma-shaped deposits. 
Fig. 3. Chirodota japonica, von Marenzeller. Group of sigma-shaped deposits. 
Fig. 4. Trochostoma molaceum, Studer. a, small irregular, table-like deposits ; b, large 
fusiform rods ; c, wine-coloured deposits ; d, calcareous ring. 
Fig. 5. Ankyroderma simile, n. sp. a, stellate aggregation of spoon-like rods ; b, basal 
portion of the central anchor-shaped rod ; c, reddish deposits ; d, table-like 
deposits ; e, tables from the posterior extremity of the body. 
Fig. 6. Ankyroderma danielsseni, n. sp. a, stellate aggregation of spoon-like rods ; 
b, basal portions of the central anchor-shaped rod ; c, the free end of the anchor ; 
d, fusiform rods ; e, small irregular plates with a central spine ; f, minute 
deposits with the long central spine carrying hooks ; g, the free end of such a 
spine, highly magnified. 
Fig. 7. Trochostoma antarcticum, n. sp. a, tables with a less-developed spire ; b, side 
view of a table with longspire and several transverse beams ; c and e, dif- 
ferent developmental stages of tables ; d, minute table with hooks at the free 
end of the long spine. 
