42 Calvin Goodrich 



Measurements of shells: 



Xo label 



Black Warrior River, Schowalter collection 



Forks Black Warrior, Walker County 



Black Warrior River, Jefferson County 

 " " " Tuscaloosa 



near Lock 15 

 " 15 



15 



Little Warrior River 

 Tombigbee River 



Anculosa smithi Goodrich, new species 

 Fig. 26 



Shell: Subglobose, smooth, shining, the diameter nearly equal to the altitude. 

 Color of epidermis citrine at top and green-yellow at base. A narrow, dark band 

 below the suture, a heavier band at the periphery, which divides into two bands, 

 these becoming obsolete behind the peristome. The sutural haitd is the only one 

 showing within the aperture. Apex eroded, only the body whorl and part of the 

 next to the last whorl remaining. Lines of growth fine, somewhat irregular as com- 

 pared with the same character in other species, these being crossed by much finer, 

 discontinuous revolving lines — a somewhat silky appearance being given to the shell 

 under the glass. Suture impressed, regular, a little waving just behind the outer lip. 

 Below the suture is a rather faint line which forms a somewhat angulated shoulder 

 upon the body whorl. Peristome sharp-edged, nearly straight, the shell thickening 

 about I mm. just within the lip. Columella rounded, flattened slightly at the base, 

 bluish-white, splashed with brown over the upper half. Aperture ovate, bluish-white. 



Operculum: Thin, reddish, translucent, rather small. Growth rays fine. The left 

 margin is curved, thickened ; the right margin more curved, thin, broken. The nucleus 

 is close to the basal margin. The spiral lines show three whorls. The operculum of 

 smithi is much more like pUcata than ainpla, being distinguishable by its smaller size, 

 thinness and finer sculpture. 



Measurements : Altitude, 12 mm.; diameter, 8^j mm. Aperture — altitude, OYz 

 mm. ; diameter, 3 mm. 



Type locality: Valley Creek, Toadvine, Jefferson County, Alabama. Drainage of 

 the Black Warrior. Collected by Herbert H. Smith, June 27, 1913. 



The type is in the Museum of Zoology, University of Michigan ; paratypcs in 

 that museum and the Alabama Museum of Natural History. 



Of 93 shells closely examined, 14 had a single well-marked raised line, 

 more or less irregular, immediately below the suture ; in 24 this line was 

 broken, discontinuous or only faintly indicated. The line did not appear 

 on the other shells at all. This would seem to be a character connecting" 

 smithi with plicata of the main stream. About one shell in three is without 



