502 MUBICIDJE. 



belong to this section, and also M. Trevillianus, M. turricula, 

 M. ruftis, and M. nanus, none of which we have met with 

 alive. We refer to figures of them. 



M. TERES, Forbes. 



Mangelia teres, Forbes et Brit. Moll. iii. p. 462, pi. 113. f. 1, 2 ; (ani- 

 mal) pi. R.R. f. 3. 



M. LEUFROYI, Michaud. 



Mangelia Leufroyi, Brit. Moll. iii. p. 468, pi. 113. f. 6, 7; (animal) 

 pi. R.R. f.l. 



M. NANUS/ Loven. 

 Mangelia nana, Brit. Moll. iii. p. 461, pi. 112. f. 8, 9. 



M. TURRICULA, Mont. 



Mangelia turricula, Brit. Moll. iii. p. 450, pi. 111. f. 7, 8; (animal) 

 pi. T.T. f.2. 



M. RUFUS, Mont. 



Mangelia rufa, Brit. Moll. iii. p. 454, pi. 112. f. 3, 4, 5; (animal) 

 pi. T.T. f. 4. 



M. TREVILLIANUS, Turton. 

 Mangelia Trevilliana, Brit. Moll. iii. p. 452, pi. 112. f. 1, 2. 



I have to say a few words on the gland which is seen in 

 many species of the Mnricidae, and is conspicuous in the 

 Murex lapillus (Purpura of authors), and which has been 

 considered by naturalists to be the organ that produced the 

 ancient far-famed Tyrian purple dye. The gland is of a white 

 or green colour ; it lies between the mucous fillets and the 

 ovarium on the right side of the animal; it is of linear 

 form, and though in some species it appears of a dark green 

 colour, the juice or secretion, when extracted and exposed to 

 the air and sun, assumes a purple hue. It is doubtful from 

 what species this famous dye was obtained ; it can scarcely 

 have been from the Murex lapillus , as Lamarck' s commentators 

 say that species does not inhabit the Mediterranean 



. . . . " Tyrioque ardebat Murice leena." 

 . . . . " te bis Afro 



Murice tinctse 

 Vestiunt lanse " . . . . 

 . . . . " Vestes Gsetulo murice tinctas." 



