OLI VA 



Species -il. (Fig. a, b, c, d, e,f, Mus. Steerc ; 

 Fig. g, Mus. Cuming.) 



Oi.iVA INFLATA. Oliv. testa, ovatd, injtatd, medio (/Mom, 

 crassissma, qnrd depresso-pland, apke elalo, acuta, 

 anfractu ultimo ad exlremitatem posticum aperturcB 

 calloso-producto, columella tuberculis duobus callosis 

 annatd, plicis suboccuUis ; ciuerasceute-albd, griseo 

 punctata, nigro-fusco fulguratd, aut maculatd, aut 

 fasciatd, interdum caruleo-olivaceo et aurantio nebu- 

 htd, vel omniw) nigro-fimcd, vel ebtirned, tuberculis 

 interdum- livido-fusco tinctis. 



The inflated Olive. Shell ovate, inflated, gibbous 

 in the middle, very thick, spire depressly flattened, 

 apex raised, sharp, last whorl callously produced at 

 the posterior end of the aperture, columella armed 

 with two callous tubercles, plaits rather faint ; ash- 

 white, dotted with grey, lightning -marked or 

 blotched or banded with black-brown, sometimes 

 clouded with blue-olive and orange, or altogether 



black-brown or ivory-white, tubercles sometime* 



tinged with livid-brown. 

 Lamarck, Anira. sans vert. (Deshayci' edit.) vol. \. p. (J19. 



Varietates. OUm nndata ami biciiictu, Lamarck. 

 Hab. Zanzibar ; Thorn. 



The form of this species is very characteristic, being 

 invariably distinguished by its swollen gibbons growth 

 and by the presence of two plicate tubercles upon the 

 columella. The painting is extremely variable, and its va- 

 rieties have been selected to characterize dift'erent species. 

 Fig. a, mottled with grey dots and encircled by two 

 broad splashed brown bands, represents Lamarck's 0. bi- 

 cincta, w-hilst the specimens Fig. d, f, g, dotted and light- 

 ning-marked with black-browii upon a greyish-white 

 ground, belong to his 0. uudata. The varieties Fig. b, c 

 are very richly banded, clouded, and zigzag-marked with 

 hvid-blue, olive, and orange. Fig. e represents a broad- 

 streaked and zigzag brown-black painted variety. Some- 

 times the species is entirely black, sometimes entirely white. 



September, 185U. 



