106 



CONCHOLOGY. 



B. undatus. 

 B. Richii. 

 B. inversus, 

 B. citrinus. 

 B. sultanus. 

 B. Pythogaster. 

 B. ovoideus. 

 B. interruptus. 

 B. Peruvianas. 

 B. Favannii. 

 B. Kambeul. 

 B. papyraceus. 

 B.calcareus. 

 B. decollatus. 

 B. Lyonetianus. 

 B. inflatus. 

 B. radiatus. 

 B. fragilis. 

 B. Gaudalupinsis. 

 B. Mexicanus. 



B. articulatus. 

 B. acutus. 

 B. scobinatus, 

 B. planidens. 

 B. ventricosus. 

 B. montanus. 

 B. hordaceus. 

 B. lubricus, 

 B. iostoma, 

 B. gcniostoma. 

 B. odontostoma. 

 B. formosus. 

 B. Listeri. 

 B. Kingii. 

 B. Dufresnii. 

 B. pulcher. 

 B. rnaugeri. 

 B. Icevis. 

 B. auris leporis. 

 B. vexillum. 



B. glandiformis.* 

 B. parvus.* 

 B. virgo.* 

 B. gracilis.* 

 B. Gibbonius.* 

 B. multilatus.* 



B. maculatus.* 

 B. Pealianus.* 

 B. lacleus.* 

 B. decora tus.* 

 B. Columbianus.* 

 B. multilineatus.* 



9. Genus Succinea, PI. X. 



Animal. See Helix. 



Shell. Terrestrial, very thin, pellucid, ovate oblong, with a 

 conical, pointed spire, formed of only one or two whorls; aperture 

 very large and oval, edges disunited ; right edge always acute, the 

 left arched, formed by a smooth attenuated columella. The shells of 

 this genus never having their lip thickened or reflected, distinguish 

 them from those of the genus BuUmus, to which they bear a 



