PLEKOCHEILUS-EURYTUS. 89 



a. Surface spirally striated. 



b. Light, with brown dots and spots, spire rather long, 



piperitus. 



bb. Dark chestnut, solid, spire short, swp&r&triaius. 



a. Surface irregularly granulate. 



b. Yellowish with brown dots, pseudopiperatus. 



bb. Chestnut-brown, markings indistinct, taylorianus. 



P. PIPERITUS Sowerby. PI. 36, fig. 77. 



Shell imperforate, ovate-acuminate, thin but rather solid ; color a 

 light broivn tint, irregularly and finely speckled and spotted u-ith 

 chestnut throughout. Surface lusterless, smoothish, under a lens 

 showing close, irregular groivth-ivrinkles cut by numerous more spaced 

 spirals. Spire regularly conic. Whorls 5, the last rather com- 

 pressed above, sack-like below, suddenly dejiexed and flattened behind 

 posterior angle of aperture. Aperture ovate, bluish and with some 

 spots within ; peristome white, a trifle thickened, not noticeably 

 expanded ; columella concave, narrow, slightly widening at insertion 

 where it is reflexed and adnate ; parietal callus thin and transpar- 

 ent. Alt. 44, diam. 25; aperture, alt. 24 mill. 



Huallaga, Peru. 



Bulinus piperitus Sows., Conch. Illustr., f. 93. Bulimus piperi- 

 tus REEVE, Couch. Syst., ii, pi. 174, f. 93; Conch. Icon., pi. 16, f. 

 96. PFR., Monogr., ii, p. 17. 



P. PSEUDOPIPERATUS Moricand. PI. 35, fig. 76. 



Shell ovate, imperforate, solid, inflated ; covered with a yellowish 

 epidermis, with scattered brown dots. Spire rather short, acumin- 

 ate ; suture impressed. Whorls 5 to 5-1, rapidly enlarging, convex, 

 the last large, deeply descending, f the length of shell, rugose-gran- 

 ulate and irregularly striated. Aperture ample, oblong-oval ; lip 

 simple, not reflexed, white ; columella reflexed, straight, calloused ; 

 inside shining, with a pearly sheen. (J/br/c.). Alt. 60, diam. 30 



mill. 



Moyobamba, Peru. 



B. pseudopiperatus MORIC., Rev. et Mag. de Zool. (2) x, 1858, p. 

 451, pi. 14, f. 2 (Oct., 1858). PFR., Monogr., vi, p. 88. 



Moricand's figure measures alt. 60, diam. 31 mill., differing con- 

 siderably from the dimensions in his text, which are, alt. 40, diam. 

 30 mill., probably by typographical error. 



