196 • Journal of the F.M.S. Museums. [Vol. X, 



This form, which I have discussed at length in the 

 paper cited, is evidently Ihe common large Pachylabra of 

 Ihe Malay States as well as of the Siamese Peninsular 

 province of Singgora. De Morgan records it from Penang 

 and Rhaman as well as from both the upper and the lower 

 Kinta and Plus valleys in Perak. It is not known to range 

 north of the Tale Sap or Inland ?>ea of Singgora. Several 

 authors have confused it wdth P. ampiillacea (Linn.) 

 [Ampullaria sumatreims, Philippij, but Nevill pointed 

 out the differences quite clearly in his " Hand List." 



