0.9 



6i/ 2 



0.8 



53/ 4 



0.8 



6i/ 



0.7 



6i/ 



0.7 



61/ 



46 James E. Conkin, Barbara M. Conkin, William T. Mason, Jr. 



Table 15. Measurements of Pupilla blandi in mm. 



Section 



and bed Apert. Apert. No. of 



Specimen nos. Length Diam. height width whorls 



43 2,5 3.0 1.2 1.1 



44, PL 1, figs. 8a, b 2, 5 3.1 1.5 0.9 



45 2,5 3.0 1.6 1.0 



46 2,5 2.9 1.3 0.9 



47 2,5 3.0 1.7 0.8 



Pupoides albilabris (C. B. Adams) 

 PI. 1, figs. 9a, 9b. 



Description. Specimens are in essential agreement with those forms described 

 by Pilsbry (1948, pp. 921-923), but the apertural height and width of our forms 

 are smaller than those of Franzen and Leonard's forms (1947, p. 370): apertural 

 height, 1.5-2.0 mm; apertural width, 1.4-1.6 mm. 



Measurements. Measurements for Pupoides albilabris are given in Table 16. 



Distribution. "Maine and Ontario, south to the Gulf of Mexico, west to the 

 Dakotas, western Arizona; northeastern Mexico to Cuba, Haiti, San Domingo, 

 Porto Rico, Bermuda (Pilsbry, 1921, Vol. 26, pt. 102, p. Ill" (Franzen and 

 Leonard, 1947, p. 371). 



Ecology. "Pupoides albilabris is tolerant of a wide range in environmental 

 conditions; it thrives in woodlands under leaf mold, loosened bark of dead trees, 

 beneath stones, and in prairies in dead grass, or even in short-grass pastures in 

 unshaded situations" (Leonard, 1950, p. 29). 



Remarks. Leonard (1950, p. 29) gave the geologic range of Pupoides albila- 

 bris as Pliocene to Recent and the species as a fossil in Texas only from the 

 Yarmouthian of the Panhandle. 



Table 16. Measurements of Pupoides albilabris in mm. 



Section 



and bed Apert. Apert. No. of 



Specimen nos. Length Diam. height width whorls 



52 2,5 4.8 2.0 1.4 



53 2,5 4.5 1.9 1.3 



54, PI. 1, figs. 9a, b 2, 5 4.1 2.0 1.3 



55 2,5 4.4 2.0 1.3 



Retinella indentata (Say) 

 PI. 2, figs. 8, 9a, 9b. 



Description. Specimens are shorter, narrower, and have fewer whorls than 

 those forms described by Pilsbry (1946, p. 289): height, 3.0 mm; diameter, 5.7 

 mm; and whorls, 42/. 



Measurements. Measurements for Retinella indentata are given in Table 17. 



Distribution. Canada, Ontario north to the Muskoka District, Manitoulin 

 Island and Ottawa. In the United States, New England and Middle States; Vir- 

 ginia, West Virginia, Ohio, and Michigan; west to Kansas; east and north Mis- 



1.3 



53/ 



1.2 



53/ 



1.2 



53/ 



1.1 



53/ 



