274 PEDICULARIIDiE. 



and thi'ee-spined. Eyes sessile on the outer bases of the 

 tentacles. Mantle enclosed, not produced into a siphon 

 in front. Foot small. 



Operculum none. 



Shell irregular, parasitic ; spire lateral, minute ; aper- 

 ture very wide; outer lip thin, simple. 



The curious Mollusk, forming the type of this family, 

 was first discovered by Mr. Swainson on the coast of 

 Sicily, parasitic on coral. The lingual dentition some- 

 what resembles that of Tricliotropis^ but the shell has 

 more the aspect of Conchopatella. 



Genus PEDICULARIA, Swainson. 



Shell ovate-oblong, surface irregular, radiately ribbed 

 in the young state ; spire minute, apex lateral, inclined 

 towards the left side ; aperture very wide, channelled in 

 front ; inner lip simple ; outer lip acute, irregular. 



Syn. Thy reus, Phil. 



Ex. P. Sicula, Swainson, pi. 29, fig. 3, 3, rt. 



The only species known is parasitic on Mediterranean 

 corals ; in the young state, there are regular, conspicuous 

 ribs, radiating from the spire to the margin of the outer 

 lip ; in an examination of an imperfect specimen, we 

 found that the eyes were seen at the outer bases of the 

 tentacles, that the mantle-margin was thickened, and 

 that there was no operculum. 



