116 ARCHACHATINA. 



arcuate, purple, obliquely truncate at the base. Aperture 

 ample, semioval, lilac within, purple near the mouth; peris- 

 tome acute, the margins joined by a glossy purple callous 

 spreading inward. Length 40, diam. 23 lines (Phil). 



West Africa. 



Achatina rhodostoma PHIL., Abbild. iii, p. 29, pi. 2, f. 2 

 (April, 1849). PFR., Conchyl. Cab. p. 293, pi. 23, f. 3; 

 Monogr. iii, 484; iv, 601; vi, 213. ? A. purpurea DESK, in 

 Fer., Hist. pi. 123, f. 1, 2. 



According to Philippi, in A. purpurea the suture is con- 

 spicuously margined while a margin is hardly indicated in 

 A. rhodostoma. The surface of purpurea is distinctly and 

 strongly granulose, even on the last whorl, not at all obso- 

 letely decussate. His figure is copied on pi. 22, fig. 11. A 

 number of specimens before me differ from purpurea chiefly 

 in the almost smooth, not decussate, last whorls, the crowded 

 streaks, often coalescent, and the paler color of the mouth, 

 which is rose rather than purple, and paler or lilac in the 

 throat. The lip is not expanded, nor is it dark-bordered, 

 as in purpurea. A specimen measures: length 88, diam. 51, 

 length of aperture 51 mm. 



9a. Var. SPLENDIDA Pilsbry, n. v. PL 22, fig. 12. 



Acute ovate, thick and heavy. Whorls 6%, the last two 

 with a distinct sutural margin. Surface minutely, some- 

 what obsoletely granulose even on the last whorl; irregularly 

 streaked with brown on a lighter ground, under a thin yellow 

 cuticle, the spire marbled with white and angularly streaked 

 with brown. Aperture bright pink inside, with a band of 

 deeper salmon-pink near the edge, which is bordered with 

 white. Columella similarly colored. The outer and basal 

 margins of the lip are expanded. Length 117, diam. 70, 

 length of aperture 70 mm. 



West Africa (coll. A. N. S. P.). 



Achatina purpurea REEVE, Conch. Syst. ii, p. 85, pi. 176, 

 f. 1. 



This form was well figured by Reeve many years ago, but 

 it seems to have been ignored by Pfeiffer, who referred 

 Reeve's figure to A. purpurea. 



