510 VOLUTA. 



ambigua. 28. Shell acuminated, minute, smooth, 

 with six or seven flattish whirls; aperture 

 sub-orbicular ; pillar slightly folded. 



Voluta ambigua. Maton and Racket, in Lin. Trans, viii. 



p. 132. 

 Turbo pallidus. Montagu Test. p. 325, and Supp. p. 133. 

 t. 21. f. 4. 



Inhabits the Devonshire coast, in Salcomb Bay. Montagu. 



Shell rather more than one-eighth of an inch long, and the 

 breadth scarcely one third of its length ; smooth, white, with 

 six or seven flattish whirls tapering to a moderately fine apex, 

 and separated by a well defined suture. Aperture sub-orbi- 

 cular, with a small umbilicus formed by the reflection of the 

 pillar-lip. Mr. Montagu is of opinion that the fold on the 

 pillar of this, as well as of several others of these minute Vo- 

 lutes, is not sufficient to authorize their removal from the 

 Turbos, and it is particularly difficult to ascertain to which 

 of these genera the present species most properly belongs. 



#* 



Sub-cylindrical ', and emarginate. 



porphyrea. 29. Shell sub-cylindrical ; spire small, 

 cuspidate ; outer lip acute ; pillar-lip incrust- 

 ed with transverse striae. 



Voluta Porphyrea. Lin. Syst. Nat. p. 1187- Born Mus. 



p. 212. Schroeter Einl. i. p. 201. Gmelin, p. 3438. 



Schreibers Conch, i. p. 100. 

 Oliva Porphyrea. Lamarck Syst. des Anim. p. 73, and 



Ann. du Mus. xvi. p. 309. 

 L'Olive de Panama. Favanne, ii. p. 818. t. 19. f. K. 

 Rumphius, t. 39. f. No. 1. Gualter, t. 24. f. P. Argen- 



ville, t. 13. f. K. Knorr, i. 1. 15. f. 1. Martini, ii. t. 



46. f. 485 and 486, and t. 47. f. 498. Enc. Meth. t. 



361. f. 4. 

 Inhabits the West Indies, and coasts of South America. 

 Shell from three to five inches long, and the breadth is about 

 two fifths of the length ; colour pale brownish red or flesh- 

 colour, marked with darker lines forming triangles of various 

 sizes, and the lower half of the whirls is coated with purplish 

 enamel. 



