BULIMULUS-BOSTRYX-PERON^TJS. 153 



Aperture over one-third the altitude of xhell, long-oval, white 

 within ; perixtoine not expanded, *li<jli1ly thickened irifhin, the col- 

 umellar margin dilated above. 



Alt. 12'6, diain. 5'2 mill. ; alt. of aperture 4'8 mill. 



Alt. 12 - 2, diam. 5 mill. ; alt. of aperture 4'6 mill. 



Frierliia, near Hiw*c<>, Chili (Bridges), under low cacti. 



Sulimus rhodacme PFR., P. Z. S., 1842, p. 187 ; Symbolic, ii, p. 

 50; Mpnogr., ii, p. 211 ; Conchyl. Cab., p. 230, pi. 62, f. 25-27.- 

 HUPE in Gay, Hist. Chile, p. 113. REEVE, Conch. Icon., pi. 14, f. 



77. 



The rose color is variable in amount, and nearly absent on some 

 specimens. The sculpture is quite characteristic, although also 

 variable in degree of development. 



B. PUSTULOSUS Broderip. PI. 46, fig. 58. 



Shell umbilicate-rimate, oblong-conical, rather solid, calcareous. 

 White or pale brownish, often with some scattered corneous-brown 

 dots, the earlier two whorls corneous. Surface lusterless, rudely 

 closely and irregularly plicate-striate, irith stronger folds at rat her wide 

 but unequal interval*; the longitudinal folds and strioj cut into rather 

 coarse granule* by incited spiral*, unequally developed ; the sculpt- 

 ure weaker above, absent on the smooth apical whorls. Spire 

 conic ; whorls 6-65, convex, the last with an ample umbilical excava- 

 tion, but only a minute perforation. 



Aperture subovate, contained 2 to 2J times in altitude of shell, 

 whitish or brown inside ; peristome slightly thickened within, the 

 outer lip regularly arcuate, not expanded, columellar lip dilated 

 above, ends of the lip approaching. 



Alt. 14, diam. 7; mill. 



Alt. 13-2, diam. 6'8 mill. 



Huaxco, Chili (Cuming, Paz and Martinez), under stones in 

 sandy situations. 



Bill-in a* /mxtiilosn* BROD., P. Z. S., 1832, p. 105. SOWB., Conch. 

 Illustr., f. 23 (not good). ftulimn.* j>ii*tii/oanx DH. in An. s. Vert., 

 viii, p. 273. PFR., Monogr., ii, p. 217 ; vi, 140 ; Conchyl. Cab., p. 

 227, pi. 62, f. 13-15. REEVE, Conch. Icon., pi. 20, f. 127. HUPE 

 in Gay, Hist. Chile, viii, p. 112, pi. 2, f. 4. HIDALGO, Mol. Viaje 

 al Pacif, p. 90 ; Journ. de Conch., 1870, p. 53. 



Very much stouter than B. rhodacme, and more irregularly and 

 roughly sculptured, but evidently allied. There is a wide range of 



