114 ARCHACHATINA. 



59, length of mouth 59 mm. The last whorl is indistinctly 

 angular peripherally, and finely decussate-granose throughout. 

 The larger specimen from Cape Palmas, figured on pi. 21, 

 fig. 8 is quite solid and heavy, granulose throughout, but 

 more finely so than A. purpurea. The early whorls are pink. 

 Length 117, diam. 77, length of aperture 71 mm. ; whorls 6%. 

 It is much more veutricose than any specimen of A. purpurea, 

 and is also larger and more solid. The outer and lower mar- 

 gins of the lip are noticeably expanded. 



7. A. PURPUREA (Gmelin). PI. 21, figs. 6, 7. 



Ovate, moderately solid. Last two whorls yellow or green- 

 ish-yellow with indistinct blackish or reddish streaks and usu- 

 ally scattered dusky dots; first three whorls usually pink. 

 Surface finely decussate-granulate, the granulation becom- 

 ing obsolete at the base. Whorls 6 to Qy 2 , convex, impressed 

 below the suture and scored by a line or lines defining a 

 sutural margin. Apex very obtuse. Aperture oblique, typi- 

 cally violet inside, but usually purplish crimson, the lip and 

 columella of the same color, with a narrow purple-brown 

 margin. 



Length 73 diam. 43, length aperture 41 mm. 



Length 89 diam. 56, length aperture 53 mm. 



AYest Africa: Liberia, Cape Mesurado to Sino (Rang) ; 

 Cape Palmas (A. N. S. P.) ; SchiefMinsville (Buttikofer). 



Bulla purpurea GMEL., Syst. Nat. (13), p. 3433 (1790). 

 -DILLWYN, Catal. i, p. 495. Bulimus purpurascens BRUG., 

 Encycl. Meth. i, p. 360 (1792). Helix purpurea FER. and 

 of RANG, Ann. Sci. Nat. xxiv, p. 27 (1831). AcJiatina pur- 

 purea LAM., An. s. Vert, iv, p. 128. POT. et MICH. Galerie 

 i, p. 130, pi. 12, f. 3, 4. Reeve, Conch. Icon, v, pi. 4, f. 15 b.- 

 KUSTER, Conchyl. Cab. p. 292, pi. 2, f. 6, 7. PFR. Monogr. 

 ii, 253 ; iii, 483 ; iv, 601 ; vi, 213. SCHEPMAN, Notes Leyden 

 Museum x, p. 247 (1888). 



A well known species, remarkable for the deep color of the 

 interior and columella. The lip is not noticeably expanded. 



According to Rang, this is an extremely abundant species 

 along the Malaguette (Liberian) coast, where it extends for 



