STROMBUS. Hf 3 



S. CALLUS, Linn. PI. 4, figs. 35, 36. 



Yellowish white, clouded and maculated with chestnut ; aper- 

 ture whitish, more or less tinged with orange-brown. 



Length, 4-6 inches. 



West Indies. 



Reeve and some earlier authors have given the Red Sea as 

 locality for this species, which. is an error; probably originally 

 caused by confounding it with S. tricornis. 



S. AURIS-DIAPUE, Linn. PL 4, figs. 37, 38. 



Shell varying from nearly smooth to roughly nodulous, the 

 nodules developed here and there upon revolving rounded ribs, 

 spire-whorls and upper part of body-whorl angulated and nodose 

 on the angle, callus of the inner lip far-spreading, sometimes 

 mounting the spire to near its apex, interior of outer lip with 

 posterior radiating ridges ; orange-brown or light chestnut, 

 speckled and marbled with white, polished ; lip and columella 

 callus whitish, more or less tinged and deepening within the aper- 

 ture to bright carnelian. Length, 3 inches. 



Indian Ocean, Mauritius, Philippines to Society Islands. 



The synonyms include S. Lamarckii, Gray; S. guttatus, 

 Martini; .8. striatogranosus, Morch. Attempts have been made 

 to separate the smoother form as S. guftatus, Mart-, but any con- 

 siderable collection embracing specimens from several localities 

 will deir.onstrate^its identity with the more nodose forms. 



Var. MELANOSTOMUS, Swainson. Fig. 38. 



Shell tinged with black or burnt chocolate color, on the margin 

 of the lip, and its posterior lobe, and on the posterior part (or 

 sometimes covering the whole) of the columellar callus. 



S. PACIFICUS, Swainson. PL 4, figs. 39, 40. 



Shell with revolving rounded ribs and nodules, and angulated 

 whorls, nodulous on the angle, as in the preceding species 

 which it also resembles in exterior coloration, but the spire is 

 longer, more convex, and the body-whorl narrower. The aper- 

 ture differs in the lip being* radiately ridged throughout instead 

 of at the posterior end only ; in the typical form the interior and 

 8 



