56 STROPHOCHEILUS-THAUMASTUS. 



This form, which seems nearly allied to S. tceniolus, S. brephoides, 

 and especially S. inca, has not been satisfactorily identified, and I 

 have, therefore, repeated the Spix-AVaguer description and figure. 



Pfeiffer has figured a form (pi. 28, figs. 2, and 3) under this name 

 which he describes as follows : 



" Shell imperforate, oblong, solid, striatulate, brownish, irregu- 

 larly streaked with rufous, and with one whitish band. Spire 

 lengthened, convex-turrited, the apex obtuse ; suture impressed, 

 subirregular. AVhorls 7, but slightly convex, the last one about f 

 the length, slightly narrowed at base. Columella white, obliquely 

 receding, subplicate, calloused at base. Aperture oblique, acumin- 

 ate, semi-oval, somewhat pearly inside ; peristome straight, some- 

 what thickened, the right margin lightly arcuate, basal regularly 

 arcuate. Alt. 58, diam. 20a-, aperture, alt. 24, width 1H mill. 

 Brazil." 



AVhether this is identical with the shell collected by Spix is some- 

 what doubtful. It should be compared with S. inca Orb. The 

 original description of Bulinus sordidus here follows: 



" T. pyramidali, transversim striata, fusca ; anfr. basali ad sutu- 

 ram subalbido; linea subcentrica pallida ; labii vix reflexi margine 

 albo. Long. Hf, lat. I poll. Habitat ad Brasiliam (Rio de Jan- 

 eiro)." 



No other information has been published. 



8. INCA Orbigny. PI. 28, figs. 10, 11. 



Shell lengthened, very obviously perforated, thick ; uniform 

 blackish-brown, paler toward the apex ; nearly smooth, with some 

 growth-lines ; spire much elongated, a little swollen, conic above 

 and rather obtuse ; whorls 8-9, quite convex, separated by a deep, 

 nearly smooth or irregular suture. Aperture oval, peristome white, 

 much thickened within ; columella thick, straight. 



Alt. 77, diam. 31 mill. (Orb.}. 



Near Carcuata, Prov. of Yungas; and ravine of Tutulima north of 

 CocJiabamba, northeast of the eastern Cordillera of Bolivia (Orb.). 



Helix inca D'ORB., Mag. de Zool., 1835, p. 16. Bulimus inca 

 D'ORB., A T oy. dans 1'Amer. Merid., p. 292, pi. 38, f. 6, 7. PFR., 

 Monogr., ii, p. 142 ; iii, p. 324. REEVE, Conch. Icon., pi. 53, f. 

 34G. Bulinus inca SOWN., Conch. Illustr., f. 67. 



Allied to S. spixii Wagn. 



