SPFXIES OF PAPUINA, PLANISPIRA, STROPHOCH KILUS AND DRYMAEUS. 25 



Readily distinguished from hua^cari, Tschudi, to which it bears some 

 resemblance in form and coloration, by its finely obliquely striated proto- 

 conch and by the absence of the spiral granulation found on that species. 



Drymaeus regularis, n. sp. 



PI. vi, fig. 6. 



Shell very narrowly umbilicate, oval acuminate, moderately solid, almost 

 smooth, numerous microscopic, close-set spiral lines, which are funder the 

 lens) more conspicuous on the last whorl, cream-coloured ground orna- 

 mented by a spiral series of small dark-brown spots just above the periphery, 

 and zigzag stripes below ; the nepionic whorls are horn-coloured, with the 

 usual characteristic Drymaeux sculpture ; whorls 6, moderately convex, last 

 about as long as the spire, and slightly ascending at termination ; aperture 

 oval, violet within, exterior markings shewing through ; peristome broadly 

 expanded, violet, paler at margin, thin, columelkir margin dilated at point 

 of insertion. 



Maj. diam. i6, alt. 31 ; peristome, maj. diam. 13, alt. 17 millim. 



Hah. — Chanchamayo, Peru. 



Near ximilaris, Moric, from which it can be readily distinguished by 

 its broader and lilac-coloured peristome. 



The colour-markings of reijularis are smaller and more spirally 

 arranged than in similar is, in which the stripes are longitudinally ziczag.. 



EXl'L.WATION OF I'LATF VI. 



Slioplioclicilns (Bonis) vcrsatilis, 11. sp. 

 StropliocliL'/liis (Horns) scniiiiidlliiihis, 11. sp. 

 Plaiiispira ( Crist li^ibba ) tccioniiiii, n. sp. 

 I'dpiiiihi l/liiini, 11. sp. 

 Pcipniiiu ( Dciiilrotroclms) piiin/lti. u. sp. 

 Hiiliiniiliis (Drviiiaciis) rt'^^iilans, 11. sp. 

 Papiiiiia siipnipu'tii, n. sp. 



