304 O. F. von Md\lendoY&~-The Landshells of Perah. [No. 4, 



16. Helix swettenhami, de Morgan. 



de Morgan, 1. c, p. 68. 



Upper portion of tlie Kinta valley. 16 mill, wide, 10 higli ; flat, 

 strongly keeled, peristome acute, colnmellar margin reflected to the 

 umbilicus. May be a Trochomor^ha or a Flectotroj)is. 



17. Helix thieroti, de Morgan. 



de Morgan, 1. c, p. 68. 



" Gounong-Tcheura," IT. of Ipoll, Kinta valley. 

 Similar to the last, but discoid, reddish brown, diam. 15, alt. 4 

 mill. This is most probably a Trochomorpha. 



18. Helix haedouini, de Morgan. 



de Morgan, 1. c, p. 68. 



Kinta valley between Lahat and Ipoli. 



Diam. 17 mill., alt. 8 mill., flat, strongly keeled, peristome expanded 

 (" evase.") Perhaps also a Trochomorpha or else a Flectotropis. 



19. Helix lahatensis, de Morgan, 

 de Morgan, 1. c, p. 68. 



Between Lahat and Ipoli, Kinta valley. 



Diam. 25 mill., alt. 14 mill., flat, slightly (" legerement ") nmbili- 

 cated, strongly keeled, yellow (" blonde "), transparent, peristome acute, 

 thin, columellar margin slightly reflected towards the umbilicus. Might 

 also be a TrocJiomor^ha. 



BULIMID^. 



20. Amphidromus perversus, Linn. 

 Perak (Dr. Townsend). 



STENOGYRID^. 



21. Stenogtra (Opeas) gracilis, Hutton. 

 Buket Pondong (Hungerford) . 



22. Stenogtra (Subulina) tchehelensis, de Morgan. 

 T. elongate turrita, gracilis, tenuis, transverse densissime arcuatim 

 striatula, corneo-flavida, opaca ; anfr. 12 planiusculi, sjpiram elongatam 

 apice subacuto efficientes ; apertura olliqua, angulate ovalis, peristoma 

 acutum, margine dextro sinuoso ; columella suhincrassata, paullum arcu- 

 ata, hasi truncata, cum margine hasali angulum rotundatum for mans. 



