PEATISOMA. ]]5 



beariiic;, 3 mm. behind the aperture, a short reverted sutiiral tube 

 curved into an arch, so that its posterior termination is close to 

 the suture, and open at both ends. Aperture slightly oblique, 

 circular. Peristome (in well-grown specimens) double, the inner 

 lip continuous and slightly protruded, augulately incised at the 



Fig. 19. — Pearsonia avana. 



suture. Outer lip expanded and produced, close to the last whorl, 

 into a small vertical tongue-shaped projection. Operculum multi- 

 spiral, almost tl;it, witli a central pi'ominent nucleus within, 

 slightly concave externally, the edges of the outer wborls being 

 free and sliglitly raised. 



mm. iiiob. 



" Major diameter 17 0-()8 



Minor ditto 14 0-56 



Altitude . 8 0-34 



Diameter of aperture 5| 0'25 " (BJanford.) 



Hah. India : Shan Hills, east of the town of Ava. 



This species has hitherto remained untigured. The accompany- 

 ing illustration is from a specimen in the general collection of the 

 British Museum. 



1G3. Pearsonia beddomei, Blanford. 



Spiritculnm beddomei., Blanford, J. A. S. B. xxxv, 1800, p. 31 ; id., 



op. cit xxxviii, 1809, p. 137 ; Pfeiffer, Men. I'lieum. Suppl. 3, 



1870, p. 48 ; Theobald, Cat. Shells Brit. India, 1870, p. 38. 

 Pterocyclos {Spinieulum) beddomei, Ilauley it llieobald, Conch. 



Ind. 1875, pi. 134, tigs. 5,6. 

 Pterocychis {Spiractilum) beddomei, Nevill, Hand List, i, 1878, 



p. 204. 

 Spiraeuhim [s. str.) beddomei, Kobelt & Miillendorff, Naclir. Dents. 



Malak. Ges. xxix, 1897, p. 114 ; id., Cut. riicmii. 1899, p. 26. 

 Pearsonia (Pearsonia) beddomei, Kobelt, Das Tierreicli, Lief. 10, 



1902, p. 172. 

 Pearso7iia beddomei, Kobelt, ('onch.-Cab., Cvclophoridae, ii, 1911, 



p. 707, pi. 112, iigs. 14-18. 



Orii/inid description : — " Shell very broadly umbilicated, de- 

 pressed, sub-discoidal, smooth, (?) solid, white with transverse 

 chestnut zig-zag stripes. Spire flat or subconvex, suture deep. 

 AVHiorls 5, rounded, the last cylindrical, descending gradually 

 towards the aperture, and furnished, 7-10 millimetres behiud the 

 peristome, \\ ith a short open sutural tube, projecting forwards 



l2 



