PSEUDOTROCHUS. 231 



interrupted and waved streaks and spots of reddish-purple. 

 Spire conoidal above, the apex obtusely papillar, generally 

 roseate. Whorls 7%, a little convex, the last very obsoletely 

 angular, two-thirds the total length, white at the columellar 

 region. Suture narrowly margined, crenulate; columella 

 vertical, obliquely truncate at the base, white, margined out- 

 wardly and within with blackish-purple. Aperture oval, 

 white within; peristome acute. Length 65, diam. 29, apert. 

 28 mm. (Shuttl.) . 



West Africa: Grand Bassam (Verreaux). 



Perideris onager SH., NotitiaB, i, p. 81, pi. 2, f. 2, 3 (1856). 

 PFR V Monogr., iv, 594; vi, 204. KOBELT, Conch. Cab., pp. 

 48, 127, pi. 30, f. 1-4; pi. 31, f. 1. 



Related to the preceding, and perhaps a variety thereof, 

 but the whorls, especially the last one, are more convex, the 

 shell is thinner, and the interior of the aperture is not 

 colored. 



Figs. 40-42 of pi. 13 are copied from Shuttleworth. Figs. 

 75, 76 of pi. 16 represent specimens in the collection of the 

 Academy. These shells are rather solid, rose-colored with 

 the apex whitish, the last whorl either roseate or whitish 

 under a very thin corneous cuticle; the baso-columellar area 

 always white and distinctly limited. The spire has rather 

 wide red-purple flames, and the last whorl varies from closely, 

 regularly striped (fig. 76) to sparsely striped and dotted, 

 and only near the middle of the whorl (fig. 75). The colu- 

 mella is white, bordered outside with purplish-brown. The 

 sharp lip is brownish, interior white with a bluish tint, one 

 specimen being brownish in the throat. Size quite uniform, 

 46 x 26 to 49 x 24 mm. 



14. P. FLAMMIGERUS (Ferussac) . PL 13, figs. 33-36. 



Shell ovate-elongate, acuminate, rather solid, rugose- 

 striate; whitish ornamented with narrow, close, chestnut 

 streaks. Spire conic, the apex papillar, white; whorls 7^/2, 

 flattened, the last about four-ninths the whole length, black- 

 ish at the base. Columella subvertical, subtruncate; suture 

 margined. Aperture oval, milk-white inside, the peristome 



