C. marginata.
C. lychnuchus.
C. planata.
C. planaria.
C. hispidula.
C. lapicida.
C. albella.
C. elegans.
C. lapicida. The stone Carocolla. Pl. [19], fig. 1.
Species discoid, very umbilicated; edges thick, but not toothed; beautiful bands.
C. marginata.
C. lychnuchus.
C. planata.
C. planaria.
C. hispidula.
C. lapicida.
C. albella.
C. elegans.
C. lapicida. The stone Carocolla. Pl. [19], fig. 1.
Species discoid, very umbilicated; edges thick, but not toothed; beautiful bands.