192 



ZONITID.'E. 



289. Austenia gigas, Bs. (Vitrina) J. A. S. B. v, 1836, p. 350 ; ? Bfr. 

 (Vitriua) Moyi. Hel. ii, 1848, p. 496 ; Blf. (Vitrina) J. A. S. B. 

 xxxiv, 2, 1865, p. 95; Godicin-Austen (Ilelicarion), /. A. S. B. 

 1875, p. 6, pi. 3 (animal extended) ; H. S,- T. (Vitrina) C. I. 1876, 

 p. 29, pi. 66, lio-s. 2, 3; Nevill, Helicarion (Austenia), Hand-l. 

 i, 3878, p. 16; Godivin- Austen, P. Z. S. 1880, p. 294, pis. 24, 25, 

 26, 27 ; id. Mol. Lid. i, 1883, p. 148, 1888, p. 228, pi. 55, figs. 3-4 b 

 (sliell and animal), pi. 60, figs. 1,1a (animal extended), pi. 62, 

 fig. 8 (radula) ; vol. ii, 1899, i^ls. 89, 90 (genitalia). 



Shell thin, polished, subovately depressed, faintly striated, oliva- 

 ceous horny; spire small, flat, projecting beyond the peristome, 



Fig. 66. — Austenia gigas, Bs. 



suture impressed; whorls about 2, very rapidly increasing, the 

 last 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 specimen 

 measiires 40 x 25 x 12 mm. 



Bob. Khasi Hills, common about Teria Ghat. Allied species in 

 Arakan Eange, west of Prome, and Kyouk Phyu and Eamri 

 Island. 



