The Nautilus. 



Vou XVIII. APRIL, 1905. No. 12 



LIST OF SHELLS FROM NORTHWESTERN FLORIDA. 



BY BRYANT AVALKER. 



In the fall of 1902, Messrs. G. F. & B. H. King of Mimsville, 

 Ga., to whom we are indebted for the discovery of several new spe- 

 cies of Unionidce recently described in the Nautilus, took a wagon 

 trip of more than one hundred miles from their home into western 

 Florida. No land shells were collected. The list of fluviatile spe- 

 cies, however, though not large, is of considerable interest, especially 

 as there are practically jio records from that part of the state. En- 

 tering Florida at Neal's Landing, the Chipola River was struck at 

 Marianna. From there the route continued southwesterly to 

 Econfina on Econfine Creek. No Unionidse were found in the 

 Econfine, but in a tributary called Moccasin Creek, several species 

 occurred. The Chipola River is a branch of the Flint River. Econ- 

 fine Creek flows directly into St. Andrew's Bay. 



Ampullai-ia depressa Say, Chipola River. 



Vivapai-a georgiana Lea, " " 



Campeloma genicula Con., " " and Mud Creek, a trib- 



utary of the Econfine. 



Lioplax pihbryi, n. sp. PI. ix. figs. 1, 2 and 3. 



Chipola River (type locality), Econfine Creek, and Mud Creek, 

 Fla. 



Shell elevated, turreted, imperforate, rather thin, olive-green 

 above, becoming almost black on the body whorl with numerous dark 



