120 THE NAUTILUS. 
220. VerTIGO PYGM#A Drap. Quebec, New England and N. 
Y., south to Va., west to Columbus, Ohio. (=V. callosa Sterki, 
not of Reuss, Paleontographica, II, p. 30, 1849). 
221. VerTIGO RUGOSULA Sterki. South Carolina, Gulf coast to 
‘Texas. 
221a. VERTIGO RUGOSULA ORALIs Sterki (n. n. for ovulwm Sterki 
preoc.). 
922. VerRTIGO OVATA Say. Eastern North America, Ont. and 
Quebec to Florida; Arizona, New Mexico. 
223. VERTIGO MORSE! Sterki. Kent Co., Michigan ; Northwest- 
ern Ohio. 
224, VERTIGO VENTRICOSA (Morse). Quebec and Maine to 
Ohio. 
224a. VERTIGO VENTRICOSA ELATIOR Sterki. New Philadelphia, 
Ohio; East Saginaw, Mich., Clearwater, Minn. 
225. VeRTIGO GouLDII Binn. Ontario, Quebec and Maine to 
Montana, south to N. J. and Md. 
295. VERTIGO APPROXIMANS Sterki. Illinois. 
226. VERTIGO BOLLESIANA (Morse). Maine to Indiana, south to 
Virginia and Tenn.; mainly in the N. E. 
226a. VERTIGO BOLLESIANA ARTHURI Martens. Little Missouri, 
Dakota. 
2927. VERTIGO TRIDENTATA Wolf. Quebec and Maine to Minn- 
esota, south to Illinois and Ohio. 
228. VERTIGO PARVULA Sterki. Summit and Lake Counties, 
Ohio. 
929. VERTIGO OSCARIANA Sterki. Florida to Texas; Tenn. 
Family ACHATINIDA. 
Genus OPEAS Albers, 1850. 
230. Opras mrcrA (Orb.). Fort Dallas, Florida; Charleston, 
S.C. West Indies and South America. Stenogyra octonoides is a 
synonym. 
231. Opras sUBULA (Pfr.). Mobile, Ala. West Indies. (Intro- 
duced in some greenhouses North). 
[ Opeas goodalli (Mill.) and an undetermined Opeas have been 
found in Phipp’s conservatory, Pittsburgh (Clapp); and the latter 
occurs also in Washington, D. C. (Lehnert). Subudina octona lives in 
Horticultural Hall, Philadelphia. Until naturalized out of doors, 
these can hardly be regarded as belonging to our fauna, any more 
than the animals of zoological gardens.] 
