L I V A 



Species 3. (Fig. 3 a and 3 c, Miis. Steere ; 

 Fig. 3 b, Mus. Colo.) 

 <)liv.\ nobilis. 0/iv. iestd eloiiffato-ci//Mraced, crns- 

 siiisciild, spird srepissiiiie acumbialo-e.Mertd, aufradihu^i 

 prope ad siiluras et ante medium siibcoutraclis, pliris 

 cnhimnlhtrihiis vix mciiierosis, anteriorihus fortiuscuUs ; 

 pallidi hided, nigricanie-fusco reticulate trifasciatd et 

 loiiijitudiiialiter undatn-drigntd, cohmielld et apertiirrp 

 fauce carneolo-lacteis. 

 The noble Olive. Shell clougatcly cylimlricnl, rather 

 thick, spire most frec^uently ac\iminately exserted, 

 whorls somewhat contracted near the sutures and 

 before the middle, columellar plaits not very numerous, 

 the front ones rather strong ; pale cream-colour, 

 rt'ticulately three-banded and longitudinally wave- 

 streaked with blaekish-brown, enbunella and interior 

 of the aperture earnelion creani-crjloiir. 

 Hah. ilauritius. 



In a genus of which the species arc so nearly related, 

 and the individuals of species so variously painted, 

 opinions must necessarily diU'er greatly as to the value 

 and limit of specific character. Although it has been my 

 eiuleavour to restrict the number of species where an ob- 

 servation of many specimens shows them to have been 

 founded upon varieties, I cannot bring my mind to believe 

 that the shell under consideration, which has been referred 

 sometimes to 0. tremuUna and sometimes to 0. en/iliro- 

 stoma, belongs to either species. Not uncommon iu col- 

 lections, and easy of recog\iition, it is uniformly of larger 

 and more solid growth than its congeners, and of a pale 

 canielion cream-colour, richly banded and blotched in net- 

 work style with dark brown, the brown being blue-clouded 

 as in other species. M. Duclos gives a very characteristic 



figure of it under 0. enjthrodoma, at PI. 31. f. 7. 

 two rather inditferent figures of it under 0. tremnUm 

 PI. 11. f. 5 and 7, of his monograph. 



Species -t. (Fig. a, Mus. Cole; Y\g.b, Mus. Steere.) 



Oliva pondekosa. Oliv. testa ohhngo-cylindraced, crassd, 

 obesd, spird parum exuerld, nnfractu ultimo upicem 

 versus plus minus producto, plicis coluniellaribus sub- 

 numerosis, parlini evanidis ; lacted, strigis undatis aui 

 rt'/ir/i/ii/tn hrcr'ihus inli-rrnptis obscure carulesceiifibus 

 (lilt rii)liii;-;.<. Iiir illii- fiiscis, sparsim pictd, cohnueUd 

 et iipertnnr faiio- curneolo-ulbis, aperturd iiiterdum 

 cariieo-nifescente tinctd. 



The ponderous Olive. Shell ol)long-cylin<lrieal, tliick, 

 stout, spire but little exserted, last whorl more (u- 

 less produced towards the apex, columellar plaits 

 rather numerous, but partially faded ; cream-white, 

 sparingly painted with obscure bluish or violet short 

 interrupted streaks, here and there brown and re- 

 ticulated, columella and interior of the aperture car- 

 ncUou-wliite, aperture sometimes tinged with Hesli- 

 pink. 



Duclos, Mou. Oliv. PI. 15. f 8 and 9. 



Rab. Mauritius. 



This fine species is distingiushcd from the prei-eiling 

 and allied forms, by its sobd structure and by the pro- 

 duced growth of the last whorl at its hind extremity, 

 where it rises into a callo>ii\ ,ilin\r the smIiht al'ii-r tin- 



manner of O.maura. 'I'lie ikiiiiHiiu- i m-i-. nf si-nttcred 



interrupted brown streaks, n licuhilnl iu ^.Lirrs, dhx-nnd 

 into a bluish violet or milky aspect, by an overcharge of 

 tlic same colourless enamel as the ground. 



Ausust, lS-')0. 



