PLATE 2 
EXPLANATION OF FIGURE 
6 Seven-tentacled young of Chiridota, seen from the ventral side. X 70. 
c r = calcareous ring; pv = polian vessel. The beginnings of the sixth and seventh 
tentacles are shown, and the heaps of six-spoked wheels are conspicuous. The 
wheels with numerous spokes are still common, however. 
