Plate 2 



Figures 1-13. — Amphidromus glaucolarynx (Dohrn): 1 (USNM 427382), form fasciatus von 

 Martens, from Wang Kien, Central Thailand. Amphidromus semitessellatus Morlet: 

 2 (USNM 419811), an unnamed color form showing reduction of the stripes, from Srakeo, 

 Southeast Thailand; 3-4 (USNM 420458), color forms from Sam Roi Yot, Peninsular 

 Thailand; 5-6 (USNM 420457), color forms from another set from Sam Roi Yot, Penin- 

 sular Thailand. Amphidromus xiengensis Morlet: 7-8 (USNM 427324), unnamed color 

 form from 300 meters elevation at Kao Sabab, Southeast Thailand; 9 (USNM 427295), 

 unnamed color form from Kao Pae Nam, Lomsak, Central Thailand; 10 (USNM 420267), 

 typical color form, from Chiengmai, North Thailand; 11-13 (USNM 419906), form clausus 

 Pilsbry, from Chiengdao, North Thailand, showing variation in reduction of the color 

 pattern. 



