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272 American Seashells
Genus Mangelia Risso 1826
Mangelia mono. Dall Morro Mangelia
Off north Carolina to Tortugas.
Figure 57!
/4 inch in length, yellowish tan. Anal notch deep. 16 to 450 fathoms.
Common. Provisionally placed in this genus. Mangilia is a misspelling.
Genus Glyphostoma Gabb 1872
Glyphostoma gabbi Dall Gabb's Mangelia
Florida, the Gulf of Mexico and the West Indies.
% inch in length. The 3 nuclear whorls are smooth and with a single,
strong carina at the periphery. Shell white with 2 wide spiral bands of rosebrown
on the whorl. The upper one is interrupted by about 1 5 short white
ribs per whorl. Fine spiral threads numerous. Notch deep, with thickened,
rounded sides. Varix strong. Moderately common from 30 to 150 fathoms.
Genus Rubellatoma Bartsch and Rehder 1939
Rubellatoina rubella Kurtz and Stimpson Reddish Mangelia
North Carolina to southeast Florida.
^ inch in length. Sinus shallow and U-shaped. Axial ribs long and
rounded (about 9 per whorl). Spiral sculpture of numerous incised hnes.
Color grayish cream with light reddish between the ribs. Commonly
dredged from 9 to 80 fathoms.
R. diomedea Bartsch and Rehder from Sanibel Island is extremely
similar, but is more brightly colored with a wide spiral band of reddish
brown. Uncommon to rare.
Genus Kurtziella Dall 191
Kurtziella liifionitella Dall Punctate Mangelia
North Carolina to both sides of Florida.
8
Figure 57a
% inch in length, semi-translucent and yellowish white. Sinus widely
V-shaped. Between the strong, rounded, axial ribs there are numerous rows
of microscopic opaque-white punctations. Uncommon from a few to 48
fathoms.
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