The figure and specific character will sufficiently point out its distinctions. The body-whorl is smooth, but strongly granulated at the base; the spire delicately striated between the ribs; the two last whorls before the apex are close, thick, and somewhat papillary; the apex itself small and sharp. The upper part of the inner lip has some faint obsolete teeth, but the base has three very strong ones.
It connects in the most beautiful manner the two genera of Mitra and Voluta. Its country is unknown.
SOLEN ambiguus.
Ambiguous Solen.
Generic Character.
Testa bivalvis, æquivalvis, transversissimè elongata, utroque latere hians. Dentes cardinales parvi, fragiles, numero variabiles, rarò divaricati. Ligamentum externum; animal ad extremitatem anteriorem pede subcylindraceo; ad posteriorem siphone brevi duos alteros conjunctos continente. Lamarck.