. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. 266 TERRESTRIAL AIR-BREATHING MOLLUSKS. p. auTiforniis, enlarged. Ildix aiiHfarmis, Bland, Ann. N. Y. Lye, VII. 37, Yi<^. (IS.'jS). — W. 0. Bin- NEY, L. & Sh., I. 88 (1869). Helix auriculata, Binney, Bust. Joiiin. Nut. Hist, (ex parte), PI. XIX. Fig. 2 (1840) ; Terr. Moll., II. 186 (ex parte), PI. XL. Fig. 1 (right luvud), 2. — RiiEVE, Con. Icon., 700. — Deshayes in Fitu., Hist., var. wimor, PI. L. Fig. 3. Helix avara, Chemnitz, ed. 2, 370 (ex parte), T. LXV. Figs. 1-2.—Pfeiffer, Mon. Hel
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. 266 TERRESTRIAL AIR-BREATHING MOLLUSKS. p. auTiforniis, enlarged. Ildix aiiHfarmis, Bland, Ann. N. Y. Lye, VII. 37, Yi<^. (IS.'jS). — W. 0. Bin- NEY, L. & Sh., I. 88 (1869). Helix auriculata, Binney, Bust. Joiiin. Nut. Hist, (ex parte), PI. XIX. Fig. 2 (1840) ; Terr. Moll., II. 186 (ex parte), PI. XL. Fig. 1 (right luvud), 2. — RiiEVE, Con. Icon., 700. — Deshayes in Fitu., Hist., var. wimor, PI. L. Fig. 3. Helix avara, Chemnitz, ed. 2, 370 (ex parte), T. LXV. Figs. 1-2.—Pfeiffer, Mon. Hel. Viv., I. 418.—Reeve, Con. Icon. 720. "i Helix Sayii, Wood, Ind. SuppL, PI. VII. Fig. 34 ; cd. Hanley, 228, Fig. 34. — DeKay, N. Y. MolL, 47. Dcvdalochila auriformis, Tkyon, Am. Journ. Conch., III. 155 (1867). Inhabits the Southern Region. From Texas to Georgia it is an extremely common species. Lnmense beds of semi-fossil specimens are found in middle Alabama. This species is common in American cabinets, and usually labelled P. avara, or var. of P. aiiriculatd, but it appears entirely distinct. It is most nearly allied to the former, but is larger, not hirsute, and has the groove in the last whorl within the umbilical region like the latter. Tlie parietal fold is somewhat similar to, but does not descend so far into the aperture as that of P. Postelliana, but the teeth on the labrum are in form and position, though more developed, rather like those of P. avara. They are separated by the same deep sinus, but the upper one generally without the sharp reflexed hook at its termination. Jaw as usual in the genus; ribs numerous. The lingual membrane (PI. VI. Fig. R) has 26—1—26 teeth, with 8 laterals. Fig. c shows the proportional greater development of the cutting point in the outer laterals. The change from laterals to marginals is not formed by the splitting of the inner cutting point, which remains simple to the extreme outer margin. This peculiarity is sha
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