M. melanomathos. The black-spined Murex.
Species which have whorls with more than three varices; the tube almost close.
M. lyratus. The lyre-shaped Murex.
Species sub-turreted.
M. vitulinus. The young Murex.
Species sub-globular; the spire and the canal rather short, very open; the aperture sub-effuse.
11. Triton. Thirty-one species.
In this genus the varices are in longitudinal rows or series, but alternating, few in number, sometimes only one on each whorl. They are never spinous or foliated, though frequently plaited or tuberculated.
The Triton variegatus type of this genus is one of the largest spiral shells.
Shell oval, with spire and canal straight, middling, generally rough, garnished with varices, rare, scattered, and preserved in longitudinal rows; aperture sub-oval, elongated, terminated by a short, open canal; the columellar edge less hollowed than the right, and covered with a callosity; operculum horny, oval, rounded, and rather large.