. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 332 TERRESTRIAL AIR-BREATHING MOLLUSKS. Fig. 214. In the Southern and Southwestern States from North Carolina to Texas, the species assumes Often, not in all localities, the form de- scribed as bucculenta. I repeat the description and figure's of the typical form, and a small variety from Alabama (Fig. 214). This last often wants the parietal tooth: this form has same jaw, lingual membrane, and genitalia as typical thyroides. Shell usually perforate, globose-conic, more or less elevated, rather thin, shining, pale yel
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 332 TERRESTRIAL AIR-BREATHING MOLLUSKS. Fig. 214. In the Southern and Southwestern States from North Carolina to Texas, the species assumes Often, not in all localities, the form de- scribed as bucculenta. I repeat the description and figure's of the typical form, and a small variety from Alabama (Fig. 214). This last often wants the parietal tooth: this form has same jaw, lingual membrane, and genitalia as typical thyroides. Shell usually perforate, globose-conic, more or less elevated, rather thin, shining, pale yellowish-green, surface regularly and delicately furrowed by the striae of growth; whorls 5 or a little more, rounded, and separated by a well-impressed suture; base convex; aperture rounded; peristome forming nearly two thirds of a circle, rather broadly reflected, white, somewhat flesh-colored behind, not completely covering a small umbilical perforation, sometimes en- Fig. M. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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