AaT. 14 TWO NEW LAND SHELLS FROM BOLIVIA MARSHALL 6 



white creniilations along the suture, and the oblique aperture all indi- 

 cate that it is properly allocated to that subgenus, and the upper 

 whorls all show that the young shell was very similar to the young 

 of several other species of the subgenus, especially Bulimulus {Scu- 

 talus) alaucla Hupe and B. {S.) thamnoicus marmorata d' Orbigny, 

 which surely is a synonym oi B. {S.) alauda. It seems possible that 

 the shells described by Hupe and d' Orbigny are immature, and if 

 fully developed would be B. {S.)'boJivianus. The thin outer lip 

 indicates young shells, but the reflection of the columella shows that 

 the adult stage is nearly reached. Unlike most species of the sub- 

 genus /Seutahis, this new species shows no traces of granulation, and 

 this serves to distinguish it sharply from B. (S.) angrandi Morelet, 

 which it mimics in form and color. 



II. S. GOVERNMENT PRINTING OFFICE; 1912 



