es 
‘ et mm 
CLASS IX. ORDER Iv. MF 
Srrompus, (dinner-hern,) animal a limax 3 
shell univalve, spiral; the lip of the aperture often | 
much dilated ; expanding, and produced into a 
groove leaning to the left. 
Murex, (thorn- shell,) animal limax ; shell ine- 
quivalve, spiral, rough, with membranaceous su- 
tures ; aperture oval, ending inan entire, straight 
or slightly ascending canal. 
Trocuus, (top-shell,) animal limax; shell uni- 
valve, spiral, more or fee CONIC: aperture some- 
what angular or rounded, the upper side trans- 
verse and contracted ; pillar placed obliquely. 
Turego, (periwinkle, stair-case,) animal limax ; 
shell univdive, spiral, solid; aperture contracted, 
orbicular, entire. 
Huras (snail,) animal limax ; shell univaive, 
spiral, subdiaphanous, brittle ; aperture contract- 
ed, semilunar or roundish. In dry and wet soil 
and water. 
Nenira, (sea-snail,) animal limax ; shell uni- 
valve, spiral, cibbose, flattish at bottom ; aperture 
-semiorbicular or semilunar ; pillar-lip transverse- 
ly truncate, flatish. 
Hatyoris, (sea-ear,) animal limax ; shell uni- 
valve, dilated, ear-form, with a longitudinal row 
of orifices along the surface ; ; spire lateral and 
nearly concealed. 
Pate va, (limpet,) animal limax ; shell uni- 
valve, subconic, shaped like a basin ; without 
spire. 
Terenpo, (ship-worm,) animal aterebella, with 
two calcareous hemispherical valves cut off before, 
and two lanceolate ones ; shell tapering, flexuoss 
and capable of penetrating wood. 
