Worth American Helices, 3 



Troostianum Lea. volvoxis Parr 



uvulifernm Shuttl. is var. of septemvolva jSay ? 



ventrosulum Pfr. vultuosum Gould, 



Subgen. Mesodon Raf. 



albolabmra Say. raultilineatum Say. 



appressura Say. Pennsylvanicum Green, 



elevatum Say. thyroides Say. 



Michelianum Lea zaleta Say 



is Mitchelianum Lea. is exoleta Binn, 



Subgen. Polygyra* Say. 



fastigiatum Say profundum Say. 



isfastigans L. W. Say, septemvolva Say. 



Gen. Iberus Mont. 



Subgen, Campylaea Beck, 



electrinus Gould sportella Gould 



is viridula Menh. is var. of Vancouverensis Leou 



Syn. pura Alder. strigosus Gould. 



Subgen. Arianta Leach. 



Townsendianus Lea. 



Gen. Hy^romia Risso.f 



Berlanderiana Moric. planorboides Raf. 



griseola Pfr. is concava Say, 



bispida L. rufescens Penn, 



Fam. STENOPID^. 



SuBFAM. HELICELLIN^4 

 Gen. iSag'da Beck. 

 Subgen. Gastrodonta Albers. 

 gularis Say. interna Say. 



* " Shell diseoidal, more or less carinated on the upper edge of the whorls, umbi- 

 licated ; aperture longer than broad ; lips thickened, toothed or folded and con- 

 tinued, folds concave beneath ; pillar-lip raised above the preceding whorl and 

 concave beneath." — Say Jour. Acad. I. 276. 1818. W. G. B'mney's Ed. p. 10. 



f In the Synonymy of Hygromia is Fruticicola Held. — Gen. of Hecent Moll. 

 I. c. 214. 



J In the text, Helicellinse stands as a subfamily of Oleacinidse, but in the Ap- 

 pendix 11. 639, H. & A. Adams add the following : — " This sub-family having a 

 caudal gland should be removed to the family Stenepidse." 



