The painted top shell, Calliostoma zizyphinum (Gastropoda, Trochidae), rare but it's there
Gittenberger, E. (2004). The painted top shell, Calliostoma zizyphinum (Gastropoda, Trochidae), rare but it's there. Vita Malacologica 2: 66, plate 15
In: Vita Malacologica. Dutch Malacological Society = Nederlandse Malacologische Vereniging: Leiden. ISSN 1572-6371, more
Also appears in:
(2004). New data on Dutch marine Mollusca. Vita Malacologica, 2. Dutch Malacological Society = Nederlandse Malacologische Vereniging: Leiden. 72 pp., more