106 THE NAUTILUS. 



152. THYSANOPHORA DIOSCORICOLA C^CA (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 BULIMULID^J. 



Genus BULIMULTJS Leach, 1815. 



Subgenus Orthotomium Crosse & Fischer. 



153. BULIMULUS 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, etc., on the 

 Rio Grande. 



153b. 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 MARINE (Alb.). Texas: two or 

 three tiers of counties north of the Rio Grande, from Corpus Christi 

 to Frio and Valverde Counties. The typical altematus has not yet 

 been found north of the Rio Grande. 



Genus DRYM^US Albers, 1850. 



155. DRYM^EUS SERPERASTRUM (Say). A Mexican species, said 

 to occur also north of the Rio Grande in Texas. 



156. DRYM,EUS DORMANT (W. G. Binn.). St. Johns River Val- 

 ley and east coast ; also West Florida, south to Caloosahatchee 

 River. 



156a. DRYM^US DORMANI ALBIDA Wright. Eastern Fla. 



157. DRYMJCUS MARIELINUS (Poey). S. Florida; Upper Mata- 

 cumba Key, N. to Micco on the east coast. 



158. DRYM^EUS FLORID ANUS (Pfr.). Florida. 



159. DRYM.EUS HEMPHILLI (Wright). East Florida, between 

 Mosquito Lagoon and the Atlantic ; Lake Helen, Volusia Co. 



