FAMILY TURBINIDZ — MARGARITA. 107 
GENUS MARGARITA. Leach. 
Shell conical, moderately elevated. Whorls few, subinflated; aperture rounded, imperfect 
posteriorly ; lip sharp; umbilicus deep. Opercle multispiral ; the nucleus central. 
Oss. This genus, instituted by Dr. Leach, includes a number of small marine shells 
hitherto included under the genus Turbo. 
MaRrGARITA ORNATA. 
PLATE VI. FIG. 104. 
(STATE COLLECTION.) 
Description. Shell moderately solid, subconical; its transverse exceeding its vertical 
diameter. Whorls four to five, convex; the body-whorl very large, subinflated. Seven to 
nine distant revolving coste on its upper surface, which is separated from the simply striate 
surface beneath by an obsolete carina. Spire scarcely much elevated, faintly striated; 
umbilicus large and very profound ; aperture rounded, oblique ; lip thin and simple, entire. 
Color. Bright red. 
Length, 0-1. Width, 0°15. 
I have met with many specimens of this beautiful shell, collected on the shores in the 
neighborhood of New-York. It is somewhat allied to M. undulata, but is much larger, and 
the costa subequal. 
MarGaRITA UNDULATA. 
Margarita undulata, Sowrrsy, Malac. and Conch. Mag. 1, p. 26. 
Turbo incarnatus. CouTuovuy, Bost. Journ, Nat. Hist. Vol. 2, p. 98, pl. 3, fig. 13. 
M., undulata, Govup, Invertebrata of Mass. p. 254, fig. 162. 
Description. Shell orbicular, small, smooth and shining. Whorls four to five, convex, 
impressed with numerous strie alternating‘with others still finer, undulated near the sutures by 
short folds or wrinkles: sutures distinct ; basal striae much finer than those above ; umbilicus 
large, extending quite to the apex, and partially covered by the reflected inner lip ; aperture 
nearly circular, very oblique. Opercle thin, horny, multispiral. 
Color. Uniform red, of various shades. 
Length, 0°3. Width, 0°4. 
This boreal shell was discovered nearly simultaneously by Messrs. Couthouy and Sowerby, 
the latter having the priority of publication. It has been found in the stomachs of fishes, 
and along the seacoast of Massachusetts. It will probably be detected on our own coast. 
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