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On our last voyage relocating our vessel from Geraldton to Shark Bay, we had good weather and had time to have a look around the area to the west of the Southern Zuytdorp Cliffs and northwest of Kalbarri. It became obvious that in addition to praeclara, both rosselli and marginata are quite different to specimens collected from other areas. The rosselli are very small with sizes varying from 38 to 45mm and are very black with narrow dorsal window slots. We have found a few black specimens with no dorsal windows at all. They are absolutely gorgeous little shells. Given they are quite different and restricted this area I have decided to use the form name "minueta" to refer to them. This small gem was found munching on a purple globe sponge in a sponge garden in 80 metres of water north west of Kalbarri. The shell has intact siphons. Gem other than some very fine micro nacre windows on the shells selvages that can be seen under magnification. It is a stunning little shell. Gem-.