PEARSONIA. 125 



rilibiiigs. Colour bleaclied. Spire very low, the apex scarcely 

 sliowing above the last whorl. (Suture deeper. Sutural tube ouly 

 G-5 from the peristome, it is 4 mm. long and sharply recurved 

 backward. Whorls 5. Aperture circular. Peristome double, 

 tliickened, outer lip expanding into a somewhat lengthened open 

 wing, ascending on tiie whorl next it, not .descending as in previous 

 species. 



" Major diam. ;50'0 ; alt. axis (i-Q mm." 



Hah. India : Upper Kotung, Abor Hills ; Upper Eotung ; 

 Tembung (Kemp). 



"A single small variety, bleached, only 28 mm. in major dia- 

 meter, was sent to me from the Miri Hills." (Godivin-Aristen.) 



175. Pearsonia putaoensis, Godwin-Austen. 



Spiracnliun putaoensis, Godwin-Austen, IJec. lud. Mus. viii, 1915 

 p. 500, pi. 40, tig. 3. 



"Shell widely umbilieated, orbicularly depressed. Sculpture, 

 fine regular trans\erse striae of growth. Colour, bleached, and 

 epidermis gone ; zig-zag streakings at regular intervals cross the 

 whorls from the suture outwards. Spire scarcely raised above the 

 last whorl. Suture impressed, the tube -^h mm.," behind the aper- 

 ture, a mere orifice, but in the perfect shell there may be a tube. 

 Whorls 4, increasing regularly. Aperture circular, oblique. 

 Peristome double, inner and outer lips continuous, the inner with 

 a slight notch near sutural margin, the outer expanded into a 

 wing or spout. 



'"Major diam. 14*0; alt. axis 4-0 mm." 



Hah. Burma: Putao, Upper Burnui {Ct/pt. E. C. ]\Iorris). 



" The habitat of this species at the head of the Irrawady valley 

 (not a very far distant one from tlie Tsanspu) is interesting and 

 I have introduced it here because in the sutural tube it approaches 

 a species found in the Abor Hills, which I next describe as S2nra- 

 culum minhmtm, and is much smaller. It also recalls Sjnrdcvhnn 

 avdersoni, Blf., from Bhamo, but this is more openly umbilieated 

 the wing similar." (Godivin-Ansten.) 



176. Pearsonia simplex, NeviU. 



Ftevocyclus {Spiracidum) vmstersi, var. simplex (.P distinct species) 

 Nevill, Hand Li.^t, i, 1878, p. i'63. ^ ^' 



Spiraculiim (s. str.) simplex, Kobelt & Mollendorff, Nacbr. Deuts. 

 Malak. Gos. xxix, 1897, p. 114; id.. Cat. Pneum. 1899, p. L'G. 



Pearsonia {Pearsonia) simplex, Kobelt, Das Tierreich Lief l(j 

 1902, p. 176. ■ ' 



"Of much simpler characters than the typical form. The last 

 whorl only a little detached; the sutural tube not bent back; the 

 suture less excavated ; and only a sn)all expanded tube at the 

 upper margin of the aperture." {Ntvill.) 



ZTah. India: ?saga I \ Wh (Eoher is). 



