434 BULLID^. 



minute specks of flake-white : mantle thick, sometimes folded 

 over part of the underside of the shell, and forming an angular 

 lobe or process just below the junction of the outer lip with 

 the body-whorl of the shell : head large and broad, deeply 

 bilobed in front, and extending (when the animal is in motion) 

 beyond the foot : tentacles large, leaf- like or obtusely trian- 

 gular, either carried erect or partly reflected on the front of 

 the shell : eyes black, minute, and sometimes concealed beneath 

 the outer integument, or " immersed in the skin : ' foot large 

 and widely expanded, bilobed in front, with small but sharp 

 angular corners on each side of that part, bluntly pointed be- 

 hind ; the lobes of the head, the tentacles, and the front of the 

 foot occasionally correspond in position, so as to present a triple 

 row of curves : verge scimitar-shaped and thick, placed behind 

 the right-hand tentacle : [gills consisting of a single long and 

 coarsely pectinated plume (Clark).] 



Shell conical above, somewhat attenuated at the base, and 

 barrel-shaped in the middle ; it is opaque and rather glossy : 

 sculpture, numerous fine spiral impressed lines, which are more 

 or less distinctly punctate on the upper part ; at the base 

 ( where the lines become broader and groove-like) they are 

 crossed by finer and close-set longitudinal striae ; the spiral 

 lines are not quite regular in their relative distance, and some 

 are deeper than others ; in one specimen I counted 70 on 

 the body-whorl, 12 on the penultimate, 8 on the next, and 4 

 on the preceding whorl, the top whorls being eroded : epidermis 

 inconspicuous : colour light pink or fleshcolour, with three 

 white bands on the body-whorl, and one beneath the suture 

 on each of the other whorls ; those on the body- whorl are thus 

 disposed — a narrow one beneath the suture, a second and 

 broader band on a level with the top of the outer lip (which 

 band is usualty continued round the base of the upper whorls), 

 and the third (which is equally broad, but occasionally want- 

 ing) encircling the middle of the body- whorl ; the latter two 

 bands are often defined by lines of a deeper pink : spire short 

 and conical : whorls 7-8, compressed although convex ; the last 

 (as usual in this family) is disproportionately large, but the 

 rest gradually decrease in size towards the apex ; the first is 

 tumid and obliquely intorted : suture fine and apparently 

 slight, but seen to be narrowl}- channelled by looking down 

 upon the spire : mouth narrowly and irregularly pear-shaped, 

 acute-angled above and obtuse-angled below, with the base 

 rounded and effuse or expanding outwards ; length two-thirds 



