. Mollusca ... ovate ear-shaped is less slug-like than Oirasia, its shell being well formed and,as a rule, less covered by the mantle. It is represented in theIndian Peninsula by the genus Pseudaustenia, which has a similarshell, but several differences in the animal. 192 Z0NITIDJ3. 289. Austenia gigas, Bs. (Viti-ina) J. A. 8. B. v, 1836, p. 350 ; ? Pfr.(Vitrina) Mon. Hel. ii, 1848, p. 496 : Blf. (Vitrina) J. A. S , 2, 1865, p. 95 ; Oodwin-Austen (Helicanon), J. A. S. , p. 6, pi. 3 (animal extended) ; (Vitrina) C. I. 1876,p. 29, pi. 66, figa. 2,3; Nevill, Helicanon
. Mollusca ... ovate ear-shaped is less slug-like than Oirasia, its shell being well formed and,as a rule, less covered by the mantle. It is represented in theIndian Peninsula by the genus Pseudaustenia, which has a similarshell, but several differences in the animal. 192 Z0NITIDJ3. 289. Austenia gigas, Bs. (Viti-ina) J. A. 8. B. v, 1836, p. 350 ; ? Pfr.(Vitrina) Mon. Hel. ii, 1848, p. 496 : Blf. (Vitrina) J. A. S , 2, 1865, p. 95 ; Oodwin-Austen (Helicanon), J. A. S. , p. 6, pi. 3 (animal extended) ; (Vitrina) C. I. 1876,p. 29, pi. 66, figa. 2,3; Nevill, Helicanon (Austenia), , 1878; p. 16; Godwin-Atisten, P. Z. S. 1880, p. 294, pis. 24, 2526,27 ; id. Mol. Ind. i, 1883, p. 148,1888,p. 228,pi. 65, figa. 3-4&(shell and animal), pi. 60, figs. 1, 1 a (animal extended), pi. 62,fig. 8 (radula); toI. ii, 1899, pla. 89, 90 (genitalia). Shell thin, polished, subovately depressed, faintly striated, oliva-ceous horny; spire small, flat, projecting beyond the Fig. 66.—Austenia gigas, Bs. suture impressed; whorls about 2, very rapidly increasing, thelast depressed above, occupying the greater part of the shell;aperture very large and oblique, ovate, the margins nearly meeting,the columellar strongly arcuate. Major diam. 30, min. 17, alt. 10 mm. A large specimenmeasures 40 x 25 x 12 mm. Bah. Khasi Hills, common about Teria Ghat. Allied species inArakan Eange, west of Prome, and Kyoiik Phyu and EamriIsland. AUSIENIA. 193 The length of the animal, when fully extended, is about6 inches. A considerable portion of the shell remains exposed(this doubtless varies in extent). The teeth of the radula arethus arranged : 69 . 3 . 22 .1 . 22 . 3 . 69 (94 .1 . 94) ; the numberof broad inner lateral (admedian) teeth being very large. Therhachidian tooth is bluntly tricuspid, the next 6 on each side have
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