No. 1736. SOME LAND SHELLS FROM PERI DALL. 179 



lands between the valley of Abancay and that of Ayacucho. The 

 species has an arboreal aspect and the statement thai it was found on 

 grasses, in view of Doctor Bingham's experience, seems to need con- 

 firmation. 



U. S. Nat. Mus. No. 209266. 



BULIMULUS (BOSTRYX I UMBILICATELLUS Pilsbry. 



Bulimulus (Bostryz) infundibulum,v&r. umbilicalellus Pilsbry, Manual, vol. L0, 

 IS!);,, j,. L31, pi. 44, figs. 93, 94. 



The specimens obtained were ashy white, with livid brown colora- 

 tion near the tip of the spire and in the umbilicus, and somewhat 

 fainter in the aperture. The profile is more convex toward the mid- 

 dle; that is, the shell is more spindle-shaped and less evenly conic than 

 the specimen figured in the Manual, and the umbilicus more tubular 

 and less funicular. The nucleus has about 31 translucent smooth 

 whorls and the remainder of the shell 71 whorls. The axial striation 

 does not differ, in the specimens examined, from that carried by 

 B. infundibulum. The length of the shell is 21, the maximum diame- 

 ter ti, the vertical height of the aperture 6.5 mm. In the absence of 

 connecting gradations this seems to be a good species. 



U. S. Nat. Mus. Xo. 209267. 



BULIMULUS (BOSTRYX) ALBICOLOR Morelet. 



Bui i mu his albicolor Morelet, Journ. de Conchyl., vol. 8, p. 374, L860; Ser. Couch., 

 vol. 3, I so:',, p. 199, pi. 11, fig. 9. 



The average of specimens of this form obtained were intermediate in 

 size between the figures given for his extremes by Morelet, otherwise 

 agreeing precisely with his figures and descriptions. The series ex- 

 amined, however, shows variations in the umbilical region from 

 closed and merely rimate, to nearly as wide as in the next species, 

 of which 1 am inclined to consider it a mere mutation. According' to 

 Angrand this form inhabits Iluanta and the valley of the Apurimac 

 River, Tern. 



U. S. Nat. Mus. No. 209268. 



BULIMULUS (BOSTRYX) OROPHILUS Morelet, var. CEREICOLA Morelet. 



Bulimus cereicola Morelet, S<'r. Conch., vol. :;, L863, p. L92, pi. !), fig. 7. 

 Bulimus lesueurianus Morelet, Ser. Couch., vol. :?, L863, p. 200, pi. 9, li.u r . 4. 

 Bulimus orophilu8 Morelet, Ser. Couch., vol. :!. isi;:;, p. L89, pi. !', ii,u r . *>. Qbis. 

 Bulimus albicolor Morelet, Ser. Couch., vol. 3, L863, p. L99, pi. !), fig. !>. 



This species was the most abundant of (hose collected, comprising 

 the axially streaked (cereicola), the spirally banded (lesueurianus), 

 and the plain whitish (albicolor); with the umbilicus varying from 

 wide to entirely closed. The typical color form with the base dark 

 colored and the portion above (he periphery axially streaked, does 

 not happen to occur in Doctor Bingham's collection. The color of 

 the nucleus varies from pale to dark horn color or pink and even dark 



