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GENUS HARPA, LAMARCK. 



THE HARP. 



Shell ovate-oblong, more or less inflated, generally pretty 

 thin, enamelled, provided with parallel, longitudinal, inclined 

 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, pltis miniisve ventricosa ; costis longitudinalibus 

 parallelis, compressis, inclinatis, acutis ; spira brevis. Apertura longitudi- 

 nalis, inferne emarginata ; canali nullo. Columella laevis, basi plana et 

 acuta. 



Animal having a flattened head, which supports a pair of 

 pretty long, thick, and conical tentaculae, with a small protu- 

 berance at their base, internally, 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 Linnaeus 

 in his BUCCTNUM, already so numerous. It contains but few 

 Harpa. A 



