The two shells figured here were
identified in
Bahamian Seashells as Bulla occidentalis (fig. 658A)
and Bulla umbilicata (fig. 659).
Malaquias & Reid (2008) have shown that
both shells are examples of the variable species Bulla occidentalis,
which is now the only representative of this genus known to occur in the
Bahamas.
Malaquias & Reid have also confirmed that
Bulla striata is a species of the eastern Atlantic and
Mediterranean, and does not occur in the western Atlantic.
Reference:
Malaquias, M. A. E. & D. G. Reid. 2008. Systematic revision of the
living species of Bullidae (Mollusca: Gastropoda: Cephalaspidea), with a
molecular phylogenetic analysis.
Zoological Journal of the Linnean Society 153(3):453-543.
