Marine, Endemic, Shell smaller than australe, and proportionately wider, with a distinctive colour pattern of two broad spiral series of reddish-brown maculations on a white ground
Powell, A.W.B. 1979New Zealand Mollusca: Marine, Land and Freshwater Shells, Collins, Auckland (p.155)
Powell, A.W.B. 1954 New Zealand Molluscan Systematics with Descriptions of New Species: Part 2, Records of the Auckland Institute and Museum, 4(4) (p.235) Original Description
The symbols K.A.C.F.M.An. are used to indicate the geographical range of the species.
They have been adopted to give an approximation of the range of each species within New Zealand.
K=
Kermadec Islands
A=
Aupourian - Kaipara Harbour, north around North Cape, encompassing the Three Kings Islands and south to East Cape
C=
Cookian - Lower North Island and the northern part of the South Island