Whelks and Conelets 249 



portion the tip of the spire is frequently broken off. 

 The mouth of the shell is oval, closed with a horny 

 operculum, and the outer lip thickened inside. The 

 animal has a foot whose broad front extends far in 

 advance of the head, which is kept under shelter 

 though it shows through the shell, as seen in the 

 figure. The siphonal fold of the mantle is very 

 rudimentary, and the eyes are behind the base of the 

 tentacles, which are united at their origin. 



The Polished Eulima {E. i^olita) has a highly 

 polished shell resembling ivory, about three-quarters 

 of an inch in length. The animal is also 

 white, but streaked and tinged with yellow ; 

 the snout marked with a golden V, the black 

 eyes ringed with yellow. Unlike its fellows, 

 this species is not parasitic, yet it lacks a 

 radula just as much as they do. This appears 

 to point to the fact that the original species of 

 Eulir)ia was a parasite who had no use for 

 a radula and exchanged it for a proboscis 

 through which fluids and soft food could be drawn ; 

 but that E. polita on giving up the parasitic ways of 

 its ancestors has not found the need for teeth. The 

 Intermediate Eulima {E. intermedia) is not quite so 

 large, more spindle-shaped, semi-transparent, and less 

 distinctly white ; and the animal is without the 

 V-mark on the snout. The Distorted Eulima (E. 

 2Mlippi) owes its name to the curved spire of the 

 slender, nearly transparent shell, which is less than a 

 quarter-inch in length. The Awl-shaped Eulima {E. 

 suhvlata) has an awl-shaped, semi-transparent thin 

 shell, half an inch long, with three pairs of spiral 

 tawny bands. The Two-lined Eulima {E. hilineata) 



