14 
sesile, opaque, dirty white or tinged with red, irregularly 
twisted and contorted, sometimes nearly straight or but 
slightly flexuous, roughened with transverse wrinkles 
usually move or less carinated and often with a smaller 
ridge on each side of the dorsal one: operculum cor- 
neous and striated. On old shells, &c. not uncommon. 
VERMILIA. 
Testaceous, cylindraceous, laterally affixed, insensibly 
attenuated towards the posterior end, more or less 
tursted ; aperture orbicular, usually armed with 
Srom one to three teeth. 
V. TriquetrRA, Lam. 2.—Serputa. T. Lin. 1265. 
(not Born)—Mont. Sup. p. 157.—Turt. D. p. 152.— 
Sow. G.—D. p. 1078,.—Sow. Brit. Mise. t.31. (good) 
—Flexuous, fixed throughout its entire length, clear 
white, (rarely pink) the base more or less flattened 
and spreading, and the dorsal portion with a very dis- 
tinct sharp simple keel, thus rendered wiangular, 
smooth. 2. 0,167. Hatremely common on Oyster 
Shells, §e. 
V. ScaBra. Lam. 7.—Affixed, serpentine, slender, 
about five minute denticulated dorsal keels. Cornwall. 
Cuass CIRRHIPEDA. 
Shell either sesihle or elevated on a flexible tendinous 
