106 THE NAUTILUS. 
152. THysANOPHORA DIOSCORICOLA CCA (Guppy). Lake 
Worth to St. Augustine in eastern, and near Hillsborough River in 
western Florida; Hidalgo, Texas. Also Trinidad, and typical 
dioscoricola from Jamaica. 
Family BULIMULIDA. 
Genus BULIMULUS Leach, 1815. 
Subgenus Orthotomium Crosse & Fischer. 
153. BuULIMULUS DEALBATUS (Say). Southern North Carolina, 
west to Kentucky, Central Missouri and Kansas; south to Ala- 
bama and the Rio Grande. 
153a. BULIMULUS DEALBATUS RAGSDALEI Pils. Texas: Cook 
and Montague Co. on the Red River, and at Comstock, ete., on the 
Rio Grande. 
155b. BULIMULUS DEALBATUS MOOREANUS (Pfr.). Texas ; mainly 
from Fort Worth to De Witt and Uvalde Counties. [This is the 
shell generally known as“ B. schiedeanus” in American collections]. 
153c. BULIMULUS DEALBATUS SCHIEDEANUS (Pfr.). Western 
Texas; mainly Mexican, Texas specimens being still rare in col- 
lections. 
154. BuLIMULUS ALTERNATUS MARI® (Alb.). Texas: two or 
three tiers of counties north of the Rio Grande, from Corpus Christi 
to Frio and Valverde Counties. The typical alternatus has not yet 
been found north of the Rio Grande. 
Genus DRYMEUS Albers, 1850. 
155. DryMaus SERPERASTRUM (Say). A Mexican species, said 
to occur also north of the Rio Grande in Texas. 
156. Drymxus porMANI (W.G. Binn.). St. Johns River Val- 
ley and east coast; also West Florida, south to Caloosahatchee 
River. 
156a. DRYMaUS DORMANI ALBIDA Wright. Eastern Fla. 
157. DRYM&Us MARIELINUS (Poey). 8S. Florida; Upper Mata- 
cumba Key, N. to Micco on the east coast. 
158. Drymxus FLORIDANUs (Pfr.). Florida. 
159. DryMxus HEMPHILLI (Wright). East Florida, between 
Mosquito Lagoon and the Atlantic; Lake Helen, Volusia Co. 
