12 



GUDE : SPECIES OF PI.ECTOPYLIS. 



transverse parallel plates, descending obliquely backwards, the 

 posterior one longest and with a short ridge posteriorly both at 

 the upper and the lower extremities ; the anterior one with a longer 

 ridge anteriorly at the upper extremity, and two short but stouter 

 ridges at the lower extremity, one anteriorly and one posteriorly ; 

 below these plates occurs a thin horizontal fold close to the lower 

 suture, becoming attenuated but distinctly perceptible at the aperture, 

 where it unites with the flexuous ridge. Palatal folds, 5 ; the three 

 upper horizontal, thin, the first and second with a denticle posteriorly; 

 the third deflected posteriorly ; the fourth vertical, the upper part 

 deflexed anteriorly, the lower part deflexed posteriorly, with two den- 

 ticles posteriorly, one about the middle and one near the lower 

 extremity; the fifth short, horizontal, indented at the middle, with a 

 slight curved denticle posteriorly. — Major diameter, 19-20 millimetres; 

 minor diameter, 16 17 millimetres; axis, 6-7 millimetres. 

 Habitat, Burma. — Type in my collection. 



Fig. 8. — Pledopylis lissochlamys, GuDE. 



The form received with P. 7iing}ia, as above mentioned, I propose 

 to distinguish as Pledopylis lissochlamys. Two specimens were sent 

 to me by Miss Linter. Dr. von MoUendorff, the German Consul in 

 Manila, Luzon, however, has obligingly sent me for inspection several 

 specimens of Flectopylis, amongst which are two (labelled Pledopylis 

 refugd) which I refer to this new species. Pledopylis lissochlamys 

 differs from P. magna in being much smaller and shining, as well as 

 paler in colour ; the shell in shape and texture resembling Pledopylis 

 piilvinaris, which, however, is a dextral shell ("Science Gossip," N. S., 

 vol. iii, page 180, fig. 25). It is more solid and darker in colour than 

 P. ponsotibyi and it is more coarsely ribbed ; the two last whorls in- 

 crease more suddenly, and the last is not constricted behind the 

 peristome as is the case in P. poisonbyi. The two parietal plates (see 



