92 PLEKOCHEILUS-EURYTUS. 



whorl, and scattered darker spots on the last whorl. Spire conic, 

 the apex obtuse. Whorls 4i, rather flat, at the slightly impressed 

 suture distinctly striate or costulate; first whorl granulate, the fol- 

 lowing striate or decussated, the last whorl nearly smooth, three- 

 h'fths the alt. of shell, inflated in front, suddenly and arcuately 

 deeply descending. 



Columella twisted, passing arcuately into peristome. Aperture 

 oblique, oval, the peristome simple, above a little reflexed, the col- 

 umellar margin narrowly reflexed and adnate, brown-flesh color; 

 terminations joined by a thin, shining, white-edged callus. Alt. 53, 

 diarn. 25 mill.; aperture, alt. 32, width 21 mill. (Miller). 



Pilaton Valley, Ecuador (P. Boetzkes). 



Eurytus aureonitens MILLER, Malak. Bl., xxv, p. 181 ; and (n. 

 F.) i, pi. 6, f. 2. 



This species is evidently allied to the two preceding, but differs in 

 the smooth body-whorl. Miller says: The vertical distribution of 

 this species seems to be restricted. It lives on leaves and is rather 

 plentiful. The columella is so strongly curved that it coils around 

 a central hole, through which one can see to the apex. 



Group of P. floccosm. 



Lengthened, imperforate, the peristome narrow. 



P. FLOCCOSUS Spix. PI. 37, figs. 86, 87, 88. 



Shell imperforate, much elongated, rather thin, but solid, hardly 

 shining. Dull purplish-brown, with scattered spots (and usually 

 some streaks) of dark purple-chestnut, each edged on the left by a 

 transverse, shadow-like buff patch; the spire clear light brown. Sur- 

 face closely and coarsely plicate-striate, and minutely, very densely, ir- 

 regularly granulate, the granulation disappearing on spire ; nepionic 

 whorls with a thimble-like punctulation. Spire conic, apex ob- 

 liquely obtuse, the tip white. Whorls 5, feebly convex, the last de- 

 scending and flattened in front. 



Aperture long-ovate, within purple-fleshy or purple-brown, macu- 

 lated with darker and cream ; peristome simple above, gently ex- 

 panded toward the base ; columella simple and very narrow below, 

 dilated and appressed above ; parietal callus a mere transparent 

 varnish. Alt. <>2, diam. 25 mill. ; aperture, alt. 38 mill. 



Napo, Ecuador (Martenez) ; Hanks of the Amazon (Spix). 



