178 NEOPETR^EUS. 



Var. ptychostylus (Pfeiffer). PI. 29, fig. 27. 



Shell rimate-umbilicate, fusiform-oblong, solid, smoothish, under 

 the lens seen to be irregularly impressed ; spire a little convexly 

 turrited, the apex rather obtuse. Whorls 7, a little convex, the 

 upper ones whitish with a few tawny stripes, the last whorl shorter 

 than the spire, light reddish, streaked and maculated with white, 

 tapering at the base. 



Aperture subvertical, auriform, with a blackish border within ; 

 peristorne simple, whitish, the margins approaching, right margin 

 broadly expanded, columellar margin much dilated. Columella 

 with a strong twisted fold. Alt. 47, diam. (above aperture) 15 mill. ; 

 aperture with peristome 23 mill, long, 16 wide. (Pfr.). 



Province Patas, Peru (Dr. Farris). 



Bulimus ptychostylus PFR., P. Z. S., 1858, p. 256, pi. 42, f. 7; 

 Malak. BL, 1859, p. 37 ; Monogr., vi, p. 34. 



Seems to be related to N. lobbiin the same way that N. arboriferus 

 var. latistrigatus is to var. rectistrigatus. 



N. MYRISTICUS (Reeve). PI. 29, fig. 28. 



Shell umbilicate, long-ovate, rather solid, wrinkle-striatulate, little 

 shining; flesh colored, irregularly painted with undulating stripes 

 of chestnut. Spire convexly turrited, rather acute; whorls 8, a 

 trifle convex, the last about four-ninths the length of the shell, tumid 

 around the very narrow umbilicus. 



Aperture vertical, oval ; peristome simple, unexpanded, the col- 

 umellar margin short, dilated, reflexed and vaulted. Alt. 40, diam. 

 (above aperture) 15 ; aperture 18 mill, long, 9 wide. (Pfr.}. 



Andes of Caxamarca, Peru (W. Lobb). 



Bulimus myristicus REEVE, P. Z. S., 1849, p. 99 ; Conch. Icon., 

 pi. 72, f. 520. PFR., Monographia, iii, p. 426. 



Like the typical N. decussatus in form, but colored like N. lobbi 

 or N. arboriferus var. rectistrigatus, from both of which it differs in 

 the non-expanded outer lip, shorter columellar lip, and smaller um- 

 bilical excavation. 



N. DECUSSATUS (Reeve). PL 32, fig. 39. 



Shell umbilicate, ovate-oblong, rather solid, rugulose-striate and 

 decussated by impressed spiral lines ; whitish-flesh colored, with 

 spiral series of " short red-brown longitudinal and oblique streaks 



