OLIVA. 



Plate XXIX. 



Species 00. (Fig. a, h, Mus. Steere.) 

 Oliva attenuata. Olio, testa ovatd, basin versus lati- 

 mculd, apicem versus peculiariter acnmiiiaid, columella 

 suiurcuatd, vix plicatu, superni ccdlosd : pellucido-cor- 

 ued,fusco-rufo late bifaxiatd. 

 The attenuated Olive. Shell ovate, rather broad 

 towards the base, peculiarly acuminated towards the 

 apex, columella slightly arched, scarcely plaited, 

 callous at the upper jiart ; transparent-horny, broadly 

 banded with brown-red. 

 Hab. ? 



This species might readily be confounded with the fol- 

 lowing from the similarity of its texture and painting, but 

 from a comparison of numerous specimens of each I feel 

 assured of then- being distinct. The 0. attenuata is uni- 

 formly more attenuated towards the apex and broader at 

 the base, whUst the sutures of the spire are less deeply ex- 

 cavated, and the browu-red bands broader and lower on 

 the shell. 



Species 91. (Fig. a, b, Mus. Steere.) 



Oliva zonalis. OUv. testa ovatd, supra medium tumidi- 

 uscnld, spird subacuminatd, colunielld arciiatd, basi 

 sitbobscure iiniplicatd ; semipellucido-coriied, fusco-riifo 

 irifasciatd, macula castaned supra colmneUam. 



The zoned Olive. Shell ovate, rather swollen above 

 the middle, spii-e slightly acuminated, columella 

 arched, somewhat obscurely one-plaited at the base ; 

 scmitransparent horny, three-banded with brown-red, 

 with a chestnut blotch at the upper part of the colu- 

 mella. 



Lamarck, Auim. sans vert. (Deshayes' edit.) vol. x. p. C31. 



Ilab. Neai- Acapulco, Mexico ; Humboldt and Bonplaud. 



The comparative difi'erence in the forms of this and the 

 preceding species is well shown by Mr. Sowerby in the 

 accompanying figures, especially in Fig. 90 b and 91 a. 

 The conformation of the columella varies slightly, the 

 bands are naiTower and three in number, and there is a 

 characteristic dark blotch on the body-whorl above the 

 columella. 



Species 92. (Fig. a, b, c, Mus. Cuming ; Fig. d, 

 Mus. Steere.) 

 Oliva fimbeiata. OUv. testa ovatd, superne tumidius- 

 culd, spird suhexsertd, columella arcuatd, vix plicatd, 

 plicis callosis ; luteo-fuscd, longitudinaliter obscure sub- 

 tilissime strigatd, fascid pallidd, reticule maculatd, 

 infra suturas. 

 The fringe-bordered Olive. Shell ovate, rather 

 swollen round the upper part, spire somewhat ex- 

 serted, cohrmella arched, scarcely plaited, plaits cal- 

 lous ; yellowish-brown, longitudinally obscurely very 

 finely streaked, encircled beneath the sutiues with a 

 pale band, blotched with net-work. 

 Hall. West Indies. 



This little species, which is liable to be confomidcd with 

 0. imitica, has a very characteristic border of fringe-paint- 

 ing round the upper part of the whorls, where it has a 

 brighter enamelled a-'^jiect and is more swoUeu. 



Fig. 93 a, b. (Mus. Metcalfe.) 

 This little shell proves on further examination to be a 

 deUcate discoloured specimen of the zigzag variety of 0. 

 viutica, represented in PI. XXVIII. Fig. 86 b, c. 



November, 1850. 



