GENUS DOLIUM. 



B. Species ivith the right lip more or less thickened into a 

 margin, and pretty strongly denticulated. 



6. DOLIUM FASCIATUM, LAM. The Banded Tun. 



> ' h 



(Collect. MASS. LAM.) SEBA, Mus. 3, t. 68, fig. 17. 



PI. Ill, fig. 5; et'Pl. IV, fig. G, var. 



.' 



D. testa ovato-ventricosa, tenuiuscula, alba, fasciis quatuor fulvo-rufis 

 versus labrum evanidis cincta ; costis convexo-planis, plerisque confertia, 

 supremis remotiusculis ; l.abro intus dentate, extus marginato. 



Shell ovate, ventricose, thin, whitish, with four or five dis- 

 tinct bands of a reddish fawn-color, rarely continued to the 

 right lip ; there is only one upon the two whirls next above 

 the lowest. The spire is brown at top, and is formed of six 

 convex whirls, encircled by projecting, pretty narrow, equal, 

 approximate, flattened ribs, a little more distant towards the 

 upper part ; they are separated by shallow furrows. Two of 

 the upper whirls are chequered as it were by intersections of 

 striae. Suture a little flattened, and slightly channeled. The 

 aperture is ovate, white, colored with red at the bottom. The 

 right lip is arcuated, and presents externally a projecting mar- 

 gin, which is crenulated outwardly by the jutting of the ribs, 

 undulated externally, and dentated within. The columella is 

 twisted ; and upon some specimens are observed several cre- 

 nulations towards the base of the left lip which partially covers 

 the umbilicus. The epidermis is thin and reddish. 



Length 5 inches. Width 4 inches. 

 Inhabits the East Indian Seas. 



This shell is very distinct from the preceding in the form of 

 the righjt lip, which is thickened and denticulated, and in the 

 distribution of the transverse fawn-colored bands which suddenly 

 stop within a third of the breadth of the shell without reaching 

 the edge. Some specimens of the same species, which appear 



