Tae THE NAUTILUS. 
293. ZONITOIDES EXIGUUS (Stimps.). Quebee and Ontario, New 
England, N. Y., Mich. 
294. ZONITOIDES MtLiIuM (Morse). Ontario to Florida, west to 
Indiana. 
294a. ZONITOIDES MILIUM PUGETENSIS (Dall). Seattle, Wash.; 
Ballena, San Diego Co., Cal. 
Genus GASTRODONTA Albers, 1850. 
295. GASTRODONTA INTERTEXTA (Binn.). Ontario to Florida, 
west to southwestern Louisiana and Indiana. A carinated form 
occurs. 
296. GASTRODONTA ACERRA (Lewis). Roan Mt., North Caro- 
lina, to Montgomery, Ala.; Indian Terr. 
297. GASTRODONTA DEMISSA (Binn.), Western Pa. to Georgia 
west to Arkansas and eastern Texas. 
297a. GASTRODONTA DEMISSA BRITTSI (Pils.). Hot Springs, Ark. 
298. GASTRODONTA CERINOIDEA (Anth.). Virginia to northern 
Florida. 
299. GASTRODONTA LIGERA (Say). Ontario to Michigan, Indian 
Terr. and Louisiana, south to Virginia and Tennessee. 
300. GASTRODONTA COLLISELLA Pils. Lookout Mt., Roane, 
Knox, Monroe and Washington counties, Tennessee ; Lexington, 
Va. 
300a. GASTRODONTA COLLISELLA PERCALLOSA Pils. Near Chat- 
tanooga and Nashville, Tenn. 
301. GASTRODONTA GULARIS (Say). Mountain region of eastern 
Tennessee, western North Carolina, northern Alabama and Georgia. 
301a. GASTRODONTA GULARIS CUSPIDATA (Lewis). Monroe Co., 
etc., eastern Tennessee ; Roan Mt. 
5302. GASTRODONTA SUPPRESSA (Say). Ontario and Michigan 
to Maryland. 
303. GASTRODONTA MACILENTA (Shuttl.). Mountains near the 
Tennessee and North Carolina boundary. 
304. GASTRODONTA LASMODON (Phillips). Eastern Tennessee, 
western North Carolina and northern Alabama. 
305. GASTRODONTA ELLIOTTI (Redf.). Same distribution. 
306. GASTRODONTA INTERNA (Say). Ohio to northern Florida, 
chiefly in Tennessee; West Virginia; northern Alabama. 
Subgenus Taxeodonta Pilsbry, 1898. 
307. GASTRODONTA SIGNIFICANS (Bld.). Fort Gibson, Indian 
Terr.; Union Co., Tenn. 
