Description
Ovate , hemispherical , or cape-shaped (ovate with a Cach broad basal opening) shell of alveolated structure, with by-spines , and with or without apical spine. Peristome surrounded by cylindrical, hollow , articulated spines . (Fig. 42) Cach
Type species
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Ovate , hemispherical , or cape-shaped (ovate with a Cach broad basal opening) shell of alveolated structure, with by-spines , and with or without apical spine. Peristome surrounded by cylindrical, hollow , articulated spines . (Fig. 42) Cach