PLATE 1 



LARGE TERRESTRIAL GASTROPODS FROM WOODLAND ASSEMBLAGES 



All figures approximately natural size 



Figs. A, B, C. - Mesodon clausus (Say); spiral, apertural, and umbilical views, 



respectively. Peoria loess, North Enion section, SE{ SE\ SW| sec. 28, 



T. 4N., R. 3E., Fulton County. 

 Figs. D, E, F. - Triodopsis fosteri (Baker); spiral, apertural, and umbilical views, 



respectively. Peoria loess, Gale section, center sec. 33, T. 14 S., R. 3 



W., Alexander County . 

 Figs. G, H, I. -Triodopsis hubrichti Baker; umbilical, apertural, and spiral views, 



respectively. Roxana silt, Gale section, center sec. 33, T. 14 S., R. 3 



W., Alexander County . 

 Figs. J, K, L. -Aniuispira alternata (Say); umbilical, apertural, and spiral views, 



respectively. Roxana silt, Gale section, center sec. 33, T. 14 S., R. 3 



W., Alexander County. 

 Figs. M, N, O. - Mesodon thyroidus (Say); spiral, apertural, and umbilical views, 



respectively. Roxana silt, Peters section, SW{ NW{ sec. 4, T. 3 N., R. 



8 W., Madison County. 

 Figs. P, Q, R. - Triodopsis alionquinensis Nason; spiral, apertural, and umbilical 



views, respectively. Peoria loess, SW| NE{ SW{ sec. 4, T. 8 N., R. 13 



W., Jersey County. 

 Figs. S, T, U. - Alloiona profunda (Say); umbilical, spiral, and apertural views, 



respectively. Roxana silt, Gale section, center sec. 33, T. 14 S., R. 3 W., 



Alexander County. 

 Figs. V, W, X. -Triodopsis altonensis Baker; spiral, apertural, and umbilical 



views, respectively. Roxana silt, Pleasant Grove section, center SE{ sec. 



20, T. 3 N., R. 8 W., Madison County. 

 Figs. AA, BB, CC. - Aniuispira kochi (Pfeiffer); spiral, apertural, and umbilical 



views, respectively. Roxana silt, Gale section, center sec. 33, T. 14 S., 



R. 3 W., Alexander County. 

 Fig. Y. - Succinea ovalis Say; apertural views. Peoria loess, SW| NE{ SW| sec. 



4, T. 8 N., R. 13 W., Jersey County. 





'14" 



