72 THE NAUTILUS. 



Genus POLYGYRA Say, 1818. 



(Typical Section). 



58. POLYGYRA CEREOLUS (Miihlf.). Florida Keys and the 

 adjacent mainland. 



58a. POLYGYRA CEREOLUS CARPENTERIANA (Bid.). Florida, 

 mainly on the west coast. 



59. POLYGYRA SEPTEMVOLVA Say. Central and northeastern 

 Florida. 



59a. POLYGYRA SEPTEMVOLVA SANCTIJOHANNIS Pils. Valley 

 of the St. John's River. 



59b. POLYGYRA SEPTEMVOLVA VOLVOXIS (Pfr.). St. Simon's I., 

 Georgia, to Florida and west to New Orleans, La., and Galvestou, 

 Texas. (Poly.febigeri Bid. is a synonym). 



59c. POLYGYRA SEPTEMVOLVA FLORIDANA Hemphill. Oyster 

 Bay, Florida. 



* * * 



60. POLYGYRA AURICULATA Say. Indian River region and St. 

 John's valley to Cedar Keys. 



60a. POLYGYRA AURICULATA MICROFORIS Dall. Johnson's 

 Sink, Alachua Co.,Fla. 



61. POLYGYRA UVULIFERA (Shuttl.). Florida, Key West and 

 Cape Sable north to Tampa Bay ; Lake Apopka. 



62. POLYGYRA AURIFORMIS (Bid.). Cornal, Bexar and Burleson 

 Counties, Texas, east to Unioutown, Ala. and Georgia. 



63. POLYGYRA ESPILOCA (" Rav." Bid.). Sullivan's I., S. C.and 

 St. Simon I., Ga., west to New Orleans, La. and Indianola, Texas. 



64. POLYGYRA POSTELLIANA (Bid.). Coast counties of Georgia 

 to Baldwin, Florida. 



65. POLYGYRA AVARA Say. Valley of the St. John's River, 

 Florida. 



66. POLYGYRA PUSTULA (Fer.). South Carolina and Lee Co., 

 Ga., south to St. Augustine and Cedar Keys, Florida. 



67. POLYGYRA PUSTULOIDES (Bid.). St. Simon I., Ga., west to 

 eastern Tennessee and Jackson Co., Ala. 



68. POLYGYRA LEPORINA (Gld.). Henry Co., Indiana, through 

 Ky. and Tenn. to Ga. ; Cape Girardeau and Barry Counties, Mo., 

 south and southwest to Ft. Gibson, Ind. Terr., and Anderson, Lee, 

 Washington, and Ft. Bend Counties, Texas. The only typical 

 Polygyra extending north of the Ohio River. 



(To be Continued.^ 



