160 ZONITID^. 



247. Khasiella climacterica, Bs. (Helix) J. A. S. B. v, 1836, p. 352 ; 



id. A. M. N. H. (2) ii, 1848, p. 163 ; id. (3) iii, 1859, p. 392 ; 

 Pfr. Mon. Hel i, 1848, p. 219; id. iii, 1868, p. 170; id. vii, 1876, 

 p. 302 ; Blf. J.A.S. B. 1865, p. 93 ; Godwin- Austen, J. A. 8. B. 

 1876, 2, p. 312 ; H. 8f T. O. I. 1876, pi. 55, figs. 4, 5. 

 Helix geitqn, Theobald, J. A. S. B. xxxiii, 1864, p. 242. 



Shell imperforate, depressedly conoid, keeled, pale horny, 

 radiately and closely subcostulate above, smooth beneath, the 

 filiform ribbing extending below the keel ; spire low, conical, apex 

 rather acute ; whorls 7-8, narrow, closely wound, flat above, each 

 rising slightly above the next at the suture, the last keeled, not 

 descending, moderately swollen below ; aperture scarcely oblique, 

 narrow, angulately lunate, securiform ; peristome obtuse, slightly 

 thickened inside, basal margin arcuate, columellar curved, slightly 

 expanded, more broadly above, where it finally becomes almost 

 vertical. 



Major diam. 21, min. 19, axis 9| mm. 



ffab. Dana Hills north, and Khasi Hills south of Assam 

 {Theobald, Godwin-Austen, &c.) ; Arakan Yoma ; Long Island, 

 Bassein Eiver (W. T. B.). 



This species varies in size and in the height of the spire ; but 

 the portion below the keel is generally deeper than the spire is 

 high. The Burmese variety is small, depressed, and sharply 

 keeled ; the smallest specimen from the Arakan Eange measures 

 only 13j, 12|, and 6| mm. Theobald's H. geiton is a dwarf Khasi 

 variety, 13-15 mm. in major diameter. 



248. Khasiella austeni, Blf. (Nanina) J. A. S. B. 1870, p. 15, pi. 3, 



fig. 10 ; Pfr. (Helix) Mon. Hel vii, 1876, p. 303 ;H.$T. (Helix) 

 C. I. 1876, pi. 50, figs. 8, 9. 



This is distinguished from K. climacterica by smaller size, higher 

 spire, much sharper keel, and stronger sculpture above. The 

 general shape is almost lenticular, the keel is compressed and 

 serrated, and in the inner whorls projects slightly above the 

 suture. 



Major diam. 14 J, rnin. 13 J, axis 6| mm. 



Hob. Habiang Garo Hills (Godwin- Austen}. 



All these three species pass into each other. 



B. Perforate. 

 a. Periphery rounded or svbangulate. 



249. Khasiella ornatissima, Bs. (Helix) A. M. N. H. (3) iii, 1859, 



p. 269 ; Pfr. (Helix) Mon. Hel, v, 1868, p. 113 ; H. 8f T. (Helix) 

 C. I. 1876, pi. 60, fig. 4 ; Godwin- Austen, J. A. S. B. 1882, 2, 

 p. 70, pi. 5, tig. 8 (animal). 



Helix anopleuris, Theobald (Bs. MS., and H. submissa, Bs. MS.}, 

 J. A. S. B xxxiii, 1864, p. 242 (no description) ; Blf. J. A. S. B. 

 xxxiv, 1865, p. 104 ; Netill, Hand-l i, 1878, p. 31. 



