684 ML REX. 



f. 4 and 5. Regenfuss, i. t. 6. f. 67. Favanne, t. 38. 

 f. E 1. 



Variety. Distorted with the beak strangely bent backwards. 

 Chemnitz, xi. p. 293. t. 211. f. 2094 and 2095. 



Inhabits the Mediterranean. Linnccm, 3;c. Adriatic. Gi- 

 nanni. Coasts of Africa. Bonanni. Guinea. Regenjuss. 



Shell about three inches and a quarter long, of which the beak 

 occupies nearly one third, and the breadth is about an inch 

 and three-quarters ; it is transversely striated, and has six or 

 seven varices, with two or three rows of large straight spines, 

 which are more or less pointed in opposite directions ; the 

 varices extend from the body-whirl successively further down 

 the beak, and each terminates in a large spine, of which an 

 obliquely spiral row is thus formed. 



TRUNCULUS. 7. Shell ovate, rough, with seven 

 sj)inoiis varices and transverse striae ; beak 

 short and perforated. 



Murex Trunculus. Limiaus Syst. Nat. p. 1215. Mar- 

 tini, iii. p. 341. t. 109. f. 1018 to 1020. Born Mus. p. 

 290. Schroeter Ei?iL i. p. 480. Gmelin, p. 3526. 

 Schreibers Conch, i. p. 193. 

 Bonanni Rec. 3. f. 27 1 and 272, and Kirch, f. 273 and 

 274. Lister Conch, t. 947. f. 42, and t. 952. f. 1. Gual- 

 ter, t. 31. f. C. Klein Ost. t. 6. f. 104. Seba, iii. t. 52. 

 f. 15 and l6. Knorr, iii. t. 13. f. 1, and v. t. 19. f. 6. 

 Favanne, t. 38. f. D 2. 

 Variety. With the whirls reversed. 

 Murex Trunculus perversus. Chemnitz, ix. part 1. p. 64. 

 t. 105. f. 897 and 898. 

 Inhabits the Mediterranean. Finnmis. Red Sea. Bonanni. 

 Coasts of Jamaica, and other West India Islands. Martini. 

 Bay of Naples. Ulysses. 

 Shell about three inches long, and an inch and three-quarters 

 broad, most commonly of a brownish white colour, and 

 sometimes variegated with brown or reddish transverse 

 bands ; the varices terminate abruptly on the beak, which is 

 broad, and rarely more than three-quarters of an inch long. 

 This is supposed to be the species from which the Ancients 

 chiefly extracted the beautiful purple known by the name of 

 the Tyrian dye. 



ROSARIUM. 8. Shell ovate, with seven furbelowed 

 spinous varices, and the beak short and per- 

 forated. 



