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MANUAL OF THE MOLLUSCA. 



Animal provided with a retractile proboscis ; eye-pedicels con- 

 nate with the tentacles ; margin of the mantle prolonged into a 

 siphon, by which water is conveyed into the branchial chamber ; 

 gills one or two, comb-like, placed obliquely over the back. 

 Species all marine. 



Family I. — Strombid^. Wing-shells. 



Shell with an expanded lip, deeply notched near the canal. 

 Operculum claw-shaped, serrated on the outer edge. 



Animal iurnished with large eyes, placed on thick pedicels ; 

 tentacles slender, rising from the middle of the eye-pedicels. 

 Foot narrow, ill-adapted for creeping. Lingual teeth single ; 

 uncini, three on each side. 



The strombs are carrion feeders, and, for molluscous animals, 

 very active ; they progress by a sort of leaping movement, turn- 

 ing their heavy shell from side to side. Their eyes are more 

 perfect than those of the other gasteropods, or of many fishes. 



Fig. 76.* 



Strombits, L. Stromb. 



Etymology, atromhos, a top. 



Type, S. pugilis (PI. IV., Fig. 1). 



Shell rather ventricose, tubercular or spiny; spire short; 

 aperture long, with a short canal above and truncated below ; 

 outer lip expanded, lobed above, and sinuated near the notch of 



* Fig. 76. Strombiis auris-Diance, L. (after Quoy and Gaimard), Amboyna. p, pro- 

 boscis, between the eye-pedicels ; /, foot, folded up ; o, operculum ; m, border of the 

 muutle ; «, respiratory siphon. 



