HEMIPLECTA.. 291 



A. Subturbinate. 



459. Hemiplecta Uter, Theobald (Helix), J. A. S. B. xxviii, 1859, 



p. 30.5 ; Ffr. (Helix) Mon. Hel. v, 1868, p. 227 ; H. i^' T. (Helix) 

 C. I. 1870, pi. oO, rigs. 7, 8; Nevill (^^m\m), Hand-l. i, 1878, 

 p. 30 ; Godioin- Austen, Mol. hid. ii, 1898, p. 77, pi. 82, rigs. 1-1 d 

 (raclula). 

 [Fig. 88, E.j 



Shell openly perforate, depressedly turbinate, thin, yellowish 

 white, ornamented with lines of growth obliquely crossed by small 

 flexuous irregular ridges and furrows, which disappear a little 

 below the periphery, the lower surface being smooth and finely de- 

 cussated ; spire conoidal, apex acute, suture impressed ; whorls 5, 

 slightly convex above, the last scarcely descending, keeled at the 

 periphery, rounded below ; aperture oblique, roundly lunate, about 

 as broad as high ; peristome thin, straight, columeUar margin 

 vertical above and triangularlj'' reflected. 



Major diam. 27, min. 24, height 17 mm. 



Hab. Near Moulmein and hills west of Toungoo {Theohald). 



Animal with a very small lobe above the mucous pore. Small 

 shell-lobes to mantle. Teeth of radula similar to those of 

 H. humpTireysiana : 77 . 38 . 10 . 1 . 10 . 38 . 77 (125 . 1 . 125). 



B. Dei~)ressed. 



460. Hemiplecta undosa, BIf. (Nauiua) J. A. S. B. 1865, 2, p. 68 ; 



r/r. (Helix) Mon. Hel. v, 18G8, p. 161 ; M. ^- T. (HeHx) C. I. 

 1870, pi. 3, figs. 2, 3 ; Nevill, Nanina (Hemiplecta), Hand-l. i, 

 1878, p. 47. 



Shell rather narrowly umbilicated, conoidly depressed, rather 

 solid, whitish, in dead shells marked above by oblique strice, crossed 

 by irregular series of close spiral (longitudinal) impressed lines, 

 smoother beneath, the concentric lines becoming fainter below the 

 periphery ; spire low, conoid, apex obtuse, suture impressed ; 

 whorls 5, rather rapidly increasing, convex above, the last broader, 

 subangulate at the periphery, rounded beneath ; aperture diagonal, 

 roundly lunate, as broad as high ; peristome simple, straight, 

 columellar margin oblique, slightly carried forward and reflected 

 above. 



Major diam. 36, min. 31, height 21 mm. 



Hah. Shan Hills, east of Mandalay, Burma. 



This species somewhat resembles the Singapore //. humphreysiana 

 in form and sculpture. Only dead decorticated specimens were 

 originally obtained, but fresh shells may have a yellowish or 

 brownish epidermis. Hanley's figure represents a shell with 

 strong oblique sculpture, a distinct keel at the periphery, and yel- 

 lowish in colour, and may represent a distinct species or variety. 



H. zimmai/ensis, Godwin-Austen, P. Z. S. 1888, p. 241, from 

 Zimme (Chieng Mai) in Siam, is a large umber-brown species, 2^ 



L-2 



