OLIVA.— Plate XVIII. 



I have the pleasure to name this fine species in honoui- 

 of Miss Steere, a lady whose magnificent collection of 

 OUves, and nice discrimination of their varieties of cha- 

 racter, have been of essential service to me in (lie pre- 

 paration of this monograph. 



Species 38. (Mus. Steere.) 



Oliva AUUATlLls. Oliv. testcl ovatd, vciUricosd, siMiis 

 concavd, spird irevi, callosd, columella medio depressd, 

 mperne callosd, pUcis parvis, uitmerosis, dmim baaali- 

 biis fortioribns, aperttird paluld ; griseo-carulesceiiie, 

 strigis Jiexiiosis saturatioribus tmdiqne pictd, zonis 

 duabim, altera fuM, alterd livido-purpured, cingulutd, 

 cohmielld alba, apertiirm fauce licido-purpurascente. 



The rippled Olive. Shell ovate, ventricose, concave 

 beneath, spire short, callons, columella depressed in 

 the middle, callous at the upper part, plaits small, 

 numerous, two basal plaits stronger, aperture witle 

 open ; greyish-blue, painted throughout with fle.xuous 

 streaks of a darker grey-blue, encircled at the base 

 with two zones, one of which is fidvous, the other 

 livid-purple, columella white, interior of the ajjerture 

 tinged with livid-purple. 

 OJ'u-a am-iciilfifia, Duclos (not of Lamarck). 



J[ab. Brazil. 



The form 0. aqnatiUs is just intermeduite between that 



of the foregoing species and of the following ; and it is 

 further characterized by the rippled painting aud divided 

 colouring of the broad basal enamel zone. 



Species 39. (Mus. Cuming.) 



Oliva aueicularia. OUv. testa depresso-ovatd, laid, 

 veiiiricosd, sublus concavd, spird brevissimd, callositale 

 occultd, colmiielld medio depressd, superne valdi cal- 

 losd, verrucosd, plicis parvis, fere occtdtis, duabus bu- 

 salibns validis, aperturd patuld ; carulescente-grisen, 

 zona basali lata, livido-fuscescente, columella alba, 

 apertura fame Uvido-fiiscescente. 



The eak-shaped Olive. Shell depressly ovate, broad, 

 ventricose, concave beneath, spire very short, con- 

 cealed by callosity, columella depressed in the 

 middle, very callous at the upper part, warty, plaits 

 small, almost concealed, two basal plaits strong, 

 aperture wide open ; bluish-grey, broad basal zone 

 bvid-brown, columella white, interior of the aperture 

 pale livid-brown. 



Lamaeck, Anim. sans vert. (Deshayes' edit.) vol. x. p. 625. 

 Oliva palida, Sowerby. 

 Uliva clutieopliila, Duclos. 



IlaL. BrazU. 



This sheU is remarkably distingi 

 bous growth, and enormous callou 

 part of the columella. 



shed by its broad gib- 

 deposit on the upper 



