LAMINELLA, MOLOKAI. 349 



below the light intervals, the surface being more or less, and 

 very irregularly, corrugated. Typically the stripes continue 

 upon the last whorl. The aperture is white (rarely pink), 

 rather oblique. Columella straight, abruptly dilated and re- 

 flexed above, bearing a small lamella. There are often one 

 or two accessory callous folds above the lamella. 



Length 15, diam. 7.3, aperture 6 mm. ; Qy 2 whorls. 



Length 13.5, diam. 6.2 mm. 



Length 13.5, diam. 7 mm. 



The animal of L. venusta is ' ' slender, body flesh-color with 

 black puncta down the sides ; tentacles very black. When ex- 

 tended, two-thirds as long as the shell " (Newconib). 



13a. Color-var. semivestita H. & P., n. var. PI. 51, figs. 6-10, 

 12. 



Shell striped on the spire, the last whorl uniform yellow 

 in the typical form; but in some specimens the dark stripes 

 are represented only by a few dots, which may be numerous 

 or very rare; others have stripes on the last whorl, but less 

 numerous than in venusta. Columella uniplicate in the type 

 lot, but biplicate in some others. Length 13, diam. 7 mm. 



Doubtless connected with the typical form, but perhaps 

 worthy of notice as a stage in the decadence of color-pattern. 



13b. Var. muscaria n. v. PI. 51, figs. 13-16. 



There is also a smaller form, salmon tinted with the apical 

 whorls paler or purple, the apertiire and columella deep pink ; 

 marked at and above the periphery with spiral lines of black 

 dots or short dashes, the base usually immaculate. The most 

 fully marked individuals have the stippling arranged ir- 

 regularly in subvertical series also, showing its origin in 

 original subvertical stripes, and these are a little sunken, 

 like the stripes of L. venusta. In one shell (fig. 14) there is 

 a band of black blotches on the base. The least marked 

 shells are merely minutely fly-specked, the dots either scat- 

 tered or forming a subsutural series, in which case they are 

 sunken. Above the small columellar lamella there is a more 

 oblique callous fold, generally small and indistinct. 



Length 13.8, diam. 7.5, aperture 6 mm.; 5% whorls. 



