PAKT II. OLIVINE. 321 



times papillary; aperture without either striae or 



groove. 



monodonta. Zool. 111. ii. 128. f. 1. terebellura. lb. f. 2. 



CoNCELix Sw. ^ Small ; cylindrical or conic ; spire ge- 

 nerally short and thick ; plaits on the pillar nu- 

 merous ; exterior often decussated. 



C. conulus. En. Meth. 382. f. 2. 



MiTRELLA Sw* Rather small; olive-shaped; 

 unequally fusiform ; always smooth and 

 polished, and sometimes covered with an 

 epidermis ; base obtuse and effuse ; spire 

 nearly or quite equal to the aperture ; 

 plaits of the pillar few^, oblique, and ex- 

 tending beyond the aperture, which is 

 smooth internally. (M. bicolor,^^. 85.) 



! ocellata. Zl. 111. v. pi. 54. f. 2. olivasformis. Zool. 111. i. pi. 48. 

 fissurata. En. M. 371. f. 1. ii . 54. f. 3. 



casta. Zool. 111. i. pi. 48. fusca. lb. ii. pi. 54. f. 1. 



bicolor. Ib.ii. 19. f.2. (Jig.85.) dactylus. En. M. 372. f. 5. 

 olivaria. En. M. 371. f.2. 



SuB-FAM. 3. OLIVINiE. Olives. 



Shell smooth, highly polished ; spire very short ; the 

 suture channeled ; inner lip much thickened ; plaits 

 numerous, crowded, extending, in the typical genus, 

 the whole length of the aperture, (fiy. 86, 8?.) 



Lampbodoma Sw. Mitriform ; spire pro- 

 duced, conic ; resembling Mitrella in shape, 

 but the suture is channelled ; the aperture 

 effuse at the base, contracted above ; lower 

 half of the pillar with 6-7 plaits, 

 volutella. Zool. Ill, ii, series, pi. 40, f, 1. (fff.86.) 



Oliva Lam. Cylindrical ; spire very short, 



pointed; pillar with numerous slender plaits ; aperture 

 narrow ; the base not effuse, {fig. 87. c.) 

 O. maura. Sow. Man. f. 457. 



T 



