PORPHYROBAPHE. 153 



iostoma and saturnus, Both have strongly defined varices indicating 

 periodical growth and rest periods, and in both the color and sculp- 

 ture usually change a little at each varix. P. saturnus shows more 

 clearly than iostoma the close relationship to Oxystyla in its colora- 

 tion of waved stripes. 



The young of P. iostoma (pi. 49, fig. 18) are exactly like Oxystyla 

 in form, the columella being slender and straight, the outer lip thin, 

 and the apex, of course, smooth. 



The jaw and teeth are similar to those of the Mexican ** Orthali- 

 cus," according to Fischer. 



P. INTEGER (PfeifFer). Unjigured. 



Shell imperforate, solid, obliquely irregularly rugulate, spirally 

 sulcate (the interstices closely arcuate-lineolate), flesh colored, 

 painted with gray -brown streaks and flammules. Spire elongated- 

 conic, rather obtuse ; suture crenulated. Whorls 7J, a little convex, 

 the last a little shorter than the spire ; columella grayish-lilac, cylin- 

 drical, somewhat twisted, arcuately passing into the peristome. 



Aperture nearly vertical, truncate-oval; peristome somewhat 



thickened, narrowly expanded, the columellar margin subdilated, 



adnate. Alt. 82, diam. 39 ; aperture, alt. 40, width 22 mill. (Pfr.). 



Province of Quito, Ecuador (Ida PfeifFer). 



Bulimus integer PFR., P. Z. S. 1855, p. 114; Monogr. iv. p. 369; 

 vi, 13. Bulimus (Dryptus) integer MARTENS in Albers, Die Hel. 

 Edit. 2, p. 194. 



Variety: Shell generally unicolored fleshy-gray ; whorls 6J, colu- 

 mella more twisted. Alt. 65, diam. 31 ; aperture alt. 34, width 17 

 mill. (Pfr.) 



An unfigured shell, the systematic position of which is not certain. 

 Miller (Malak Blatter xxv, 184) thinks integer specifically identical 

 with P. iostoma, but I would hardly agree with this opinion, judging 

 from the description alone. 

 P. SATURNUS (PfeifFer). PI. 50, figs. 23, 24, 25. 



Shell ovate-conic or oblong-conic, solid. Pale lilac under a thin 

 yellowish olive cuticle, usually in part lost, or remaining in spiral hair- 

 lines, the spire with three earlier whorls uniform yellowish-corneous, 

 the next whorl with a series of brown spots below the suture, penulti- 

 mate and next earlier whorls with numerous waved brown stripes on a 

 yellowish ground, these stripes sometimes continuing on the last whorl, 



