OLIVA.— Plate I. 



moratd, strigis transverm uigricauf.e-castaneis, acute 

 angulatu, hie illic longitudinaliter picta, columella 

 palUde canieold, rosea tineta. 



The angled Olive. Shell ovate, veiitricose, very thick, 

 ponderous, angularly swollen above the middle, spire 

 rather short, columella very caUous, flatly plaited, 

 plaits almost obsolete ; ash-white, mottled with olive 

 and grey, longitudinally painted here and there with 

 sharply angled transverse very dark chestnut streaks, 

 columella pale carnelion tinged with rose. 



Lamarck, Anim. saus vert. (Deshayes' edit.) vol. x. p. 007. 

 Valuta incrassata, DiUvvyn. 

 Eadem var. Oliva azemula, Duclos. 



Hah. Gulf of Nicoiya, Central America (in sandy nmd at 

 the depth of nine fathoms) ; Cuming. 



There is little variation in this tine species, which is dis- 

 tinguished from all others by its very thickened angular 

 growth, and sharply zigzag bokl splashes of colouring. 



Species 2. (Fig. «, Mus. Cuming ; Fig. b, 

 Mus. Steere.) 

 ()LIVA PORPHYRIA. Olw. tesfd cgUiidraceo-obhugd, 

 veidrkosd, permnpld, spird hmi, suMepressd, apice 



elato, columella tumidd, undique dense plicatd, plicis 

 paululum ohscuris ; violaceo-carned, lineis ustulato- 

 rufa undique angiilato-reticulatd, maculis grandihus 

 obscure bifasciatd, columella had violaceo tinctd. 



The porphyey Olive. Shell cylindrically oblong, ven- 

 tricose, very large, spire short, rather depressed, apex 

 raised, columella swollen, densely plaited throughout, 

 plaits a little obscm-e ; violet-flesh colour, angularly 

 reticulated throughout with burnt-red Unes, and 

 obscurely two-banded with large blotches of the 

 same colour, columella tinged at the base with violet. 



Voluta parphjria, Linuffius, Syst. Nat. (13th edit.) p. 

 1187. 



Olivia porphyria, Lamarck. 

 Cylinder porphyreticus, D'Ai-genville. 



Hab. Panama (in sandy mud at low water) ; Cuming. 



This fine species, the largest of the genus, is remark- 

 ably distinct from any other. From the peculiarity of 

 its mai-king it has been long known as the ' Camp Olive.' 

 Eegarding the shell in the position in which it would be 

 if the animal were placed with its head to the left of the 

 observer, the interstitial spaces of the net-work have the 

 appearance of a dense encampment of various-sized tents. 



