GENUS BUCCINUM. 



89 



91. BUCCINUM POL.YGONATUM, LAM. The Polygon Buc- 



(Collect. MASS. LAM.) Voy. de I'Astr., pi. 32, fig. 28-29, var. 

 Pi. XXIX, fig. 119. 



B. testA ovato-conica, longitudinaliter costata, transversim rainutissim^ 

 striata, olivacea, costis prorainentibus ; spira obtusiuscula ; apertuia rotun- 

 dat ; labro extus marginato, intus striato. 



Shell ovate, conical, spire composed of six or seven indis- 

 tinct whirls, sub-convex, plaited throughout their whole length, 

 crossed by fine and very close transverse striae ; those of the 

 base more prominent ; the longitudinal folds disappear insen- 

 sibly upon the right side of the lowest whirl, at the upper 

 part of which we find merely nodosities ; aperture rounded, 

 whitish ; the cavity of a brown color, and marked by trans- 

 verse bands ; right lip bordered externally, and ornamented 

 internally, with small, fine striae ; columella arcuated, covered 

 with a pretty wide callosity, brown at its upper part, and 

 white towards the base, which is adorned with small guttules. 

 The coloring is olive, with a white or yellowish band. Upon 

 the top of the lowest whirl, the folds and the tubercles are 

 sometimes whitish. 



Length 9 lines. Width 5 lines. 



Inhabits the coasts of Brazil, and those of New Holland, at 

 Port Jackson. 



Quoy and Gaimard have given, in the Atlas to their Voyage, 

 p. 3^,.fig^,?8 .<md 29, a variety of this species, which we have ^ 

 also refJre-sfeirtfed ftrb&r plate 27, fig. 107. This last differs only 

 from the one we have just described, by the absence of folds 

 upon the lowest whirl, and the indistinctness of the callosity. 

 This variety comes from Port Jackson. 



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