PLECTOPYHS. 



]33 



pale chestnut streaks crossing the whorls, transverselv and 

 sinuously striated with decussating spiral lines above and below ; 

 epidermis thin, horny. Apex minutely granulate or sub-granulate, 

 almost imperceptibly raised above the flat spire; suture not 

 impressed, very narrowly marginate. Whorls 6, narrow and 

 closely wound, flat above ; the last angulate above the periphery, 

 rounded beneath, descending close to the mouth, very slightly 

 compressed behind the same. Umbilicus very shallow, exposing 

 all the whorls, aperture diagonal, truncately subcircular ; peristome 

 white, reflexed throughout, margins joined by a raised bar, from 

 the centre of which a lamina passes up the parietal side of the 

 whorl to the plication, which lies at about i the circumference of 

 the whorl from the mouth, and resembles that of Helix achatina. 

 Gray ; the parietal transverse lamina being simple and oblique 

 above, then bifurcating, giving off the lamina which runs to the 

 mouth, and two short basal supports. A thread-like lamina also 

 runs along the extreme base of the parietal side of the whorl, and 

 joins the aperture. Palatal teeth 5, the upper 3 and the lowest 

 longitudinal, the uppermost very long and thin, the 4th vertical, 

 corresponding to the fork in the parietal lamina. 



"Major diam. 13-18, minor 11-15 mm.; axis 4-5 mm." 

 {Blanford.) 



Hah. Burma : Banks of Tsanda Khyoung, near Kaintha village, 

 and Banks of Nungatho Khyoung, Henzada district, Pegu 

 {Blanford) ; Myanoung, Arakan Hills (Blmiford). 



The parietal armature consists of a long horizontal fold, united 

 to the ridge at the aperture, and proceeding parallel with the last 



Fig. 66. —Plectopylis /iarenornm. 



whorl for a quarter of its length, at which point it gives off a 

 shortly descending arm ; it then rises obliquely for a short distance 

 and finally bifurcates, the lower arm of the bifurcation being the 

 longer, and obliquely descending, while the upper arm is slightly 

 curved backwards ; the single arm first mentioned has posteriorly at 

 its lower termination a short obliquely descending ridge, and a little 

 higher up anteriorly a stronger obliquely ascending ridge, while the 

 lower arm of the bifurcation has posteriorly at its lower termination 



