154 I'ORIMIYROBAPHE. 



sometimes almost obsolete there ; three or four brotul lilnckish varices 

 appearing on the penultimate and last whorls. Surface slightly glossy, 

 with rather strong, fold-like stria? on the spire, the last whorl smoother, 

 with a plicate band below the suture, and decussated with irregular 

 spiral grooves. Whorls 6, the earlier 2^ smooth, forming the nepi- 

 onic shell ; last whorl convex, sometimes ridged at the varices ; apex 

 obtuse. 



Aperture somewhat oblique, ovate, pure white within; peristome 

 black, thick, somewhat reflexed ; columella slightly folded, nearly 

 straight, mainly black ; a black parietal callus deeply entering the 

 aperture. 



Alt. 70, diam. 38, longest axis of aperture 39 mill. 



PaHatanga Ecuador (Fraser). 



Butimus saturamts (error for saturnns) PFR., P. Z. S. I860, p. 136. 

 B. satiHinus (error for satrtrnus) PKR., P. Z. S. 1860, Mollusca, 

 pi. 51, f. 6. liiiUnms safimws PKR., Malak. Blatter, viii, 1861, p. 

 11 ; Monogr. vi, p. 14. Porphyrobaphe saturn/is DOHRN, Jahrb. 

 D. M. Ges. ix, 1882, p. 111. 



I have below reproduced Pfeiffer's description because his type 

 (fig. 25) was much more copiously striped than any of the specimens 

 I have seen. The " lilac-flesh " ground color is concealed in good 

 specimens by a thin yellowish-olive cuticle, which is easily rubbed 

 off', and remains chieHy in the grooves of the spiral and growth stri;r, 

 usually as fine spiral capillary lines. The varices arc black and con- 

 spicuous, usually three in number, one being on the penultimate, the 

 others on the last whorl. The columella becomes bluish-white towards 

 its insertion. There is considerable variation in size, the smallest 

 specimens I have seen being about 60 mill, long, while Dohrn men- 

 tiniis one measuring alt. 82, diam. 33, length of aperture 41 mill. 



Pfeiffer'a original description is as follows: 



Shell imperfnrate, somewhat fusiform oblong, solid; of a lilac-flesh 

 tint flann'd with brown. Spin- conic, tin- apex rather acute, white. 

 Whorls I'..',, the upper smooth, the rest obliquely striated, last whorl 

 -nmother, having several with; blackish varices, a little shorter than 

 tin- >pire. tapering at the base. Columella (hick, twisted, black. 



Aperture subvertical, acuminate, oblong; peristome black, nar- 

 rowly retlexed, the margins joined by a black callus. 



Alt. 7d, diam. .'53, aperture including peristome 38 mill. long. 



