g GENUS H ARPA. 



harp. The shell is generally whitish, with bands on the ribs of 

 a rose-colored tint ; some specimens are colored more brightly, 

 and have the ribs alternated with brown, rose-colored, and 

 white lines. The interstices are filled with arched yellowish or 

 brown spots. 



2. HARPA ARTICULARIS, LAM. The Articulated Harp. 



(Collect. MASS. LAM.) GUALTIERI, Test., pi. 29, fig. D. 

 PI. II, fig. 3. 



H. testa ovata, subventricosa, grisea ; costis angustis distantibus albo 

 nigroque articulatim maculatis ; spira exsertiuscula, muriculata. 



Shell ovate, ventricose, rather thin ; spire conical, indistinctly 

 muricated ; the ribs pretty narrow, distant, slightly flattened, 

 marked by transverse brown lines, articulated and winding 

 like light festoons ; between these lines appear white and 

 violet spots, Interstice between the ribs grayish. The lon- 

 gitudinal waved lines which are there seen, are strongly arch- 

 ed, and very contiguous to each other, they form species of 

 transverse bands, at the origin of which exists a triangular 

 brown chestnut-colored spot ; the sharpest angle of this spot is 

 continued sometimes into the interstices, in the middle of the 

 narrow and white bands formed by the bars to the number of 

 twelve upon the last whirl. The brown bars are less conspic- 

 uous. Aperture large, ovate, of a violet color upon the edge, 

 and reddish within ; through these colors are perceived the 

 transverse brown bands. The columella is polished, covered 

 over its whole length by a large brown chestnut-colored spot. 



Length 3 inches. Width 2 inches. 

 Inhabits the Indian Ocean. 



This shell appears sufficiently distinct from the ventricose harp, 

 for us to retain it as a distinct species, as was done by Lamarck. 

 The coloring of the ribs is pretty constant in the distribution of 

 the transverse bands, which are always very apparent and very 

 near each other. 



