Genus HARPA, Lamarcx. 
THE HARP. 
Shell ovate-oblong, more or less inflated, generally pretty 
thin, enamelled, provided with parallel, longitudinal, mclined 
and acute ribs; the last whirl much larger than all the others 
together ; spire slightly elevated; aperture large, oval, dilated, 
strongly emarginated inferiorly, and without canal; right lip 
bordered by the last rib; columella smooth, simple, nearly 
straight, pointed at the base. 
Testa ovato-oblonga, plis minisve ventricosa; costis longitudinalibus 
parallelis, compressis, inclinatis, acutis; spira brevis. Apertura longitudi- 
nalis, inferné emarginata; canali nullo. Columella levis, basi plana et 
acuta. 
Animal having a flattened head, which supports a pair of 
pretty long, thick, and conical tentacule, with a small protu- 
berance at their base, mternally, where the eyes are situated. 
Mouth simple, surrounded by a muscular margin, and furnish- 
ed with a small, slender and pointed trunk. The organ of 
excitement elongated, cylindrical, situated on the right side. 
Locomotive organ very large, very broad at the anterior part, 
which is ear-shaped, and distinguished by a deep emargina- 
tion upon each side; the posterior extremity caducous, and 
destitute of an operculum. 
This genus, instituted by Lamarck, was included by Linneus 
in his Bucctnum, already so numerous. It contains but few 
Harpa. A 
