55 



SIGARETUS. 

 GENERIC CHARACTER: The shell earshaped, nearly 

 orbicular ; left lip short and spiral; aperture entire, much 

 dilated, rounded, oblong ; margins not united. 



* S. PERSPICUUS. Bulla Haliotoidea. Mont. Test. Brit., 

 vol 2, p. 211. pi. 7, fig. 6. S. Haliotoideus. Flem. Brit. 

 An., p. 360. S. P. Forbes, Fauna Monensis, p, 29. 

 Obtained from near the Land's-end. 



PL1CAOEA. 



Aperture of the shell not effuse; columella plaited. 

 TORNATELLA. 

 GENERIC CHARACTER: The shell convolute, ovale 



cylindrical, mostly striated transversely ; no epidermis ; 



aperture oblong, entire, the right lip sharp ; one or more 



plaits on the columella. 

 T. TORN ATILIS. Voluta T. Turt. Lin. Pen. Brit. 



Zo., vol. 4, pi. 71, fig. 88. T. T. Flem. Brit. An., 



p. 336. I have only seen two specimens ; whicli were 



procured from the west of the County. 

 T. DENTICULATA. Voluta D. Mont. Test. Brit., 



vol. 1, p. 234. Action D. Flem. Brit. An., p. 337. A 



specimen from the Land's end. 



SCALARIANA. 

 Without plaits on the columella ; margins of the aperture 

 circularly united. Shells of this family have a tendency to 

 form a loose spire, so that the whorls are often disunited and 

 do not rest on one another. This is so remarkable in the 

 genus Verrnetus, that its most proper place would seem to be 

 among the Serpulaceae ; but the shell is not attached to a 

 foreign bodv, being commonly twisted together; and the 

 animal is altogether different, not being of the annuiated 

 order, but a true mollusc, Jour. Science. 



VERMETUS. 



GENERIC CHARACTER: Shell thin, tubular, loose 

 spiral, adhering by the spire. Aperture orbicular, margins 

 united. Operculum cartilaginous. 



* V. INTORTUS. Vermiculum I. Mont. Test, Brit., 



vol. 2, p. 520, Flem. Brit. An., p. 233. Not uncommon. 

 V. PERFORATUS. Vermiculum P. Mont. Test. Brit., 

 vol. 2, p. 519. " We have found it in Cornwall, and 

 sometimes with the small interior compartment worn off 

 which gives it the appearance of being naturally per- 

 forated." Montagu. 



SCALARIA. 



GENERIC CHARACTER: The shell subturreted, spire 

 more or less elongated, the last whorl rather larger than the 



