146 OXYSTTLA, SOUTH AMERICAN. 



stantly black-brown, and this dark sliade colors the right margin of 

 the lip and the whole eolmnella. Alt. 55, diam. 24 mill. 



Around the Missions of San Xai-ier and C'oncepcion, Prov. Chiqui- 

 tos. liolivia (Orb.)- 



Helix phlogera OHH., Mag. de Zool. 1835, p. 8. Buliums pltlogems 

 OKB., Voy. ilans I'Amer. Merid. p. 257. pi. 29. f. 0, 7. PFK., Monogr. 

 ii, p. 145 (part). Orthalicus phlogerus BECK. Index, p. 59. Acha- 

 tina phlogera PKK., Symbohv ii, p. 134. 



Orbignv's description, from which the above is taken, does not 

 tally very well with his figures of this species. It is evidently allied 

 to (). bensoni Kve., a larger and granulose species, occurring in a 

 moister and more tropical region. The smaller size of 0. phlogera, 

 the less developed color-pattern on the last whorl as compared with 

 0. bensoni, and the broad variceal streaks, are all attributable to the 

 sparsely wooded and dry character of the region it inhabits. 



O. i-KEiFKEKi (Hidalgo). PI. 55, figs. 48, 49, 50. 



Shell oblong-conic, rather solid, smooth, little shining; whitish- 

 violaceous, very closely painted with longitudinal somewhat waved 

 brown lines, and wide straight (variceal) streaks at irregular dis- 

 taiu-es, each composed of a white and a brown streak ; covered with 

 an olivaceous cuticle. Spire long-conic, the apex tawny, rather ob- 

 tuse ; suture simple or lightly plicate. Whorls 7-8, nearly ilat, 

 widening at a moderate rate, the last not descending in front, slightly 

 angular at its origin, somewhat tapering below. 



Aperture oblong-semioval, three sevenths the length of the shell, 

 dull white or brown inside; peristome simple, acute, broadly hlack- 

 hordered inside, the margins joined by a blackish entering callus; 

 columella a little twisted, rather straight, black, covered inside \\iih 

 a thick whitish callus. (///>/.) 



Alt. 52, diam. 2.'5 mill. 



( 'itttrfiis. /'rinnfnr (Marline/). 



Ortlili<-ns /if, /fl'i/-/ HID.. .lonrn. de Conchy I., iHl'.'.t, p. -H ; Catal. 

 Cm|. Am. Merid., p. .">'.! (in .lonrn. de Conchy]., 1K7<>), pi. <>, ('. ,H ; 

 Viaje ; ,l Pin-iti.-o, Mi)lnscn>, p. i;)5, ji|. s. I'. ;?. 4. PFH., Monogi-. \ iii, 

 p. -JC.1. /<!,,,, /,/,///;// Mil ii R, Mai. Blalt. 1S7H. xxv, p. 1st',. 



The longer spire, llalti-r \\ liorls, structure of the coluniella and sy-- 

 l-m of coloration, ;ire the eharacler. separating thi^ species from 0. 

 phlogera ( )rl>. 



