FAMILY:
GENUS:
SPECIES:
Enlarged x 8
29
FAMILY:
GENUS:
SPECIES:
Enlarged x 8
30
These are the largest of the ribbed planar types found at Greta and Bungwahl respectively. These two are allied but there are strong differences; size of protoconch (both smooth), the shape of the whorls and apertures, coiling habit, extent of spire and umbilicus. The ribbing of No 30 is distinct, alternating thick and thin ribs.