8TROPHOCHEILUS-THAUMASTUS. 55 



with fine subreticulate impressions. The following whorls are 

 grooved by wrinkle-strire, which naturally become coarser with the 

 shell's growth. The species is apparently nearest S. thompsoni, but 

 it is less lengthened, and not so variegated above. 



S. REQUIENI Pfeiffer. PI. 27, fig. 94. 



Shell imperforate, oblong-ovate, rather thin ; closely striated 

 lengthwise, little shining ; olive-brown, somewhat spotted with 

 rufous at the submargined suture. Spire conic, apex obtuse, sub- 

 immersed. Whorls 5, slightly convex, rapidly increasing, the last 

 a little shorter than the spire, obsoletely striated. Columella cal- 

 loused, lightly arcuate, obsoletely truncated at base of the aperture, 

 which is oval and a little oblique ; peristonie simple, unexpanded, 

 brown-margined within. Alt. 62, diam. 26 ; aperture, alt. 32, 

 width in the middle 17 mill. (Pfr.~). 



Brazil (Cuming Coll.). 



Bulimus requieni PFR., P. Z. S., 1852, p. 137 ; Conchyl. Cab., p. 

 248, pi. 66, f. 8 ; Monogr., iii, p. 389. 



Seems to belong to the group of S. thompsoni, but the apical 

 sculpture is unknown. 



Group of S. inca. 



Perforate or umbilicate, elongated ; nepionic shell with fine lon- 

 gitudinal wrinkles, sometimes irregular. 



S. SPIXII Wagner. PI. 28, fig. 1. 



Shell oblong-ovate, solid, longitudinally striate, subim perforate, 

 covered with a thin cuticle. Whorls 7 to 8, inflated-convex, sepa- 

 rated by deep sutures. Spire inflated-conic, with obtuse apex, the 

 length of the last whorl. Aperture ovate, smooth ; peristome thick- 

 ened, the left margin forming an oblique fold at columella ; umbili- 

 cal chink none or very narrow. Color of shell white, with brown- 

 ish epidermis, the aperture white. 



Alt. 2 inches, 1 line ; diam. H lines. (Wagn.'). 



Brazil, exact locality unknown (Spix). 



Bulimus spixii WAGNER, Test. Bras. p. 11, pi. 10, f. 3. Columna 

 bulimea SPIX, 1. c., pi. 10, f. 3 (1827). 



? Bulimus hyalinu* WAGNER, t. c. t p. 6. />'. fr<ii/il!.< Spix, t. c., 

 pi. 6, f. 3 (young shell). 



? Bulimus *]>ixi PFR., Novit. Conch., i, p. 56, pi. 16, f. 5, 6. 



? Bulinus sordidus KING, Zool. Journ. v, p. 341 (1831). 



