24 THE NAUTILUS. 



In Texas it is an abundant species, at times, in the central eastern 

 part of the state, and no doubt ranges north from there. But there 

 are no records from the valley of the Eio Grande and, as stated be- 

 fore, none from Mexico. This river would therefore seem beyond 

 the southwestern range of the species. 



So far as the records show, it is apparently absent from the entire 

 coastal region on the Gulf. 



Since the above was written and the map (Plate III) was pre- 

 pared, Mr. H. H. Smith has collected typical hicarinatus in 

 Beaver Creek, Conecuh Co., Ala. This " find " not only carries 

 the species further south than previously recorded, but brings 

 it into the western extension of the Atlantic fauna area along 

 the Gulf Coast. Beaver Creek is a tributary of Murder Creek, 

 which forms part of the Escambia River drainage system. 



West of the Appalachian Mountains, hicarinatus is, in suitable 

 localities, a common species in all the states as far west as Kansas 

 and Colorado, and there is no great doubt but that it ranges, in suit- 

 able environment, west to the mountains. But the data at hand are 

 too few and too scattering to give any exact information as to the 

 limits of the western range. They are indicated on the map and 

 given in detail in the following list : 



Distributional Data. 

 United States. 



Alabama: Big Willis Creek, Atalla; Coosa River, Minnesota 

 Bend; Black Warrior River, Jefferson Co.; Cub Creek, Pinehill; 

 Princeton (Walker); Beech Creek, Selma; Cahawba River (Lewis); 

 Coosa River, Farmer (Hinkley). 



Arizona : None. 



Colorado : Boulder (Pils.); Lodge Pole Creek, Logan Co.; Owens 

 Lake, Boulder; Weld Co.; Greely (Henderson). 



Connecticut : West Granby, Hartford Co. (Pils.). 



Arkansas : White River, Carroll; Big Creek, Sebastian; Ouachita 

 River, Hot Spring (Sampson). 



Delaware : Brandywine River, between Dupont's and Rockland 

 (Pils.). 



District of Columbia : Washington (Pils.). 



Florida : None. 



Georgia : East Rome (Pils.); Silver Creek, East Rome; Armuchee 

 Creek, Rome; Dalton (Walker). 



