DRYM^US, SOUTH AMERICAN. 229 



pi. 18, f. 7, 8 ; Monogr., iv, p. 392. Bulimulus (Drymceus) musicus 

 PAETEL, Catalog, p. 101. 



Excessively variable in coloration. 



Typical strigatus (figs. 39, 40) is boldly striped with blackish- 

 brown, the stripes either comparatively straight or markedly zigzag. 

 They never extend over the base of the shell. I do not see any 

 differential characters between strigatus and musivus (figs. 42-45). 

 A form with narrow brown stripes in place of the wide ones occurs. 



Color-var. purus (fig. 41). Uniform white or with a single dark 

 basal band ; lip and columella purple within. 



Color var. saceatus Pfr. (figs. 46-49). White or whitish with 

 three interrupted spiral blackish bands, and often more or less 

 oblique streaking. 



It is altogether likely that B. delphincs and mar ice of Moricand 

 are forms of this species ; the series before me includes specimens 

 closely resembling Moricand's figure of the former. Only full 

 collections can decide whether delphince, eecilece and marice are 

 really varieties in the true sense. 



Var. DELPHIN^; (Moricand). PI. 42, fig. 50. 



Shell umbilicate, ovate-pyramidal, thin, lightly striatulate ; rose- 

 ate, unicolored or interruptedly banded or maculate with black ; 

 spire conic, obtuse ; whorls 5i-6J, nearly flat, the suture impressed, 

 last whorl about as long as the spire; columella straight. Aperture 

 shaped as in the genus Partula, vertical, ovate-oblong, lilac-colored 

 inside; peristome expanded, white, the right lip strongly curved 

 above, expanded, white. Alt. 20-22, diam. 8-9 mill. (J/on'c.). 



Tarapoto, Peru (Moric.) ; on the way from Rio Mayo, a tributary 

 of the Huallaga JR., to Lamas, in a red sandstone region, n.-e. Peru 

 (Stiibel). 



Bulimus delphince MORIC., Eev. et Mag. de Zool. (2), x, 1858, p. 

 452, pi. 14, f. 3. PFR., Monogr., vi, p. 37. Otostomus (Drymceus) 

 delphince Moric., MARTENS, Conchol. Mittheil., p. 160. 



Moricand writes : This shell varies a little in form, which is 

 more or less elongated, and in color-pattern. It is always rosy, 

 shining, with the interior of the aperture of a more or less deep lilac. 

 Sometimes instead of being entirely roseate, these are several brown- 

 ish bands on the last whorl, not reaching to the suture, and other 



