PSEUDOTROCHUS. 235 



or purple-black at the base of the last whorl, which is copi- 

 ously striped with ragged, opaque creamy or yellowish- white 

 stripes, this coloring also showing vividly within the mouth; 

 on the penult, whorl and the preceding one, the pattern 

 would be described as of red-brown stripes or flames on a 

 whitish ground. The sutural margin is very narrow, though 

 distinct. It commonly measures 32 to 33 mm. long, 18 wide. 

 The dark coloring is sometimes wanting, as in a pale speci- 

 men (fig. 56), figured by Pfeiffer from Dohrn's collection. 



18. P. GOULDII (Reeve). PI. 15, figs. 57, 58, 59. 



Shell imperforate, thin, ovate-conic, with teat-like apex 

 and subangular or angular periphery; whitish or reddish 

 under a thin yellow cuticle, which is marked with whitish, 

 hydrophanous lacerated stripes on the upper post-embryonic 

 whorls of the spire, and a belt of similar square spots below 

 the peripheral angle, which is marked with a narrow red- 

 dish belt. Surface hardly shining, with low growth-wrinkles 

 and fine, faint spiral strise. Whorls 7, moderately convex. 

 Aperture oblique, ovate, pale livid- whitish inside; outer lip 

 acute; columella very narrow, thin, obliquely subtruncate 

 below. Length 48-49, diam. 23-24 mm. 



West Africa: Liberia (Dr. Perkins). 



Achatina gouldii REEVE, Conch. Icon., v, pi. 23, f. 128 

 (March, 1850). Achatina bait eat a GLD., Proc. Boston Soc. 

 N. II., iii, p. 195 (April, 1850). PFR., Monogr, iii, p. 480. 

 Perideris lalteata PPR., Monogr., iv, p. 593 ; vi, 204. KOBELT, 

 Conchyl. Cab, p. 34, pi. 10, f. 4, 5; pi. 16, f. 2, 3. Not 

 Achatina balteata Reeve, 1849. 



Remarkable for its belt and flames of hydrophanous, whit- 

 ish cuticle; but the latter is easily rubbed off. 



19. P. SAULCYDI (Joannis). PL 11, fig. 20. 



Shell quite solid, ovoid, the spire much swollen and notice- 

 ably girdled at the suture; the first whorls teat-like. The 

 last whorl is as large as all the rest together. Surface rough- 

 ened by quite irregular striag of growth. Two distinct de- 

 scending grooves on the lower part of the belly of the shell, 



