618 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 117 



ratios 1.96 and 1.94, with 7 and 6}4 whorls. A third shell from 

 Kao Chong, Patalung(?) (USNM 419829), is 28.6 mm. high, h/d 

 ratio 1.91, with 63^ whorls. It is slightly thinner than the other two 

 and the surface is relatively worn. Possibly it is misidentified. 



Amphidromus glaucolarynx (Dohrn, 1861) 



Plate 2 (fig. 1) 



Bulimus glaucolarynx Dohrn, 1861, Proc. Zool. Soc. London, 1861, p. 207, pi. 26, 



fig. 7 [Siam]. 

 Amphidromus glaucolary7ix (Dohrn) . — Laidlaw and Solem, 1961, Fieldiana, Zool., 



vol. 41, no. 4, pp. 524-525. 



Specimens of the relatively obese A. g. f. Jasciatus von Martens 

 were seen from Wang Kien (USNM 427382), Srakeo (USNM 419794), 

 and Petchabm-i (USNM 365544) in Central Thailand plus Pak 

 Chong (USNM 367511) in East Thailand. Three of the four adults 

 are sinistral, the fourth dextral. Height ranges from 32.7-38.2 mm., 

 h/d ratio 1.63-1.84, whorls 6 to 6J^. 



Amphidromus schomburgki (Pfeiffer, 1860) 



Bulimus schomburgki Pfeiffer, 1860, Proc. Zool. Soc. London, 1860, p. 137, pi. 51, 



fig. 9 [Siam]. 

 Amphidromus schomhurgki (Pfeiffer). — Laidlaw and Solem, 1961, Fieldiana, Zool., 



vol. 41, no. 4, p. 526. 



Material from Srkacha (USNM 405883a), Hinlap (USNM 420314), 

 and Kao Sabab at 1,000 feet elevation (USNM 427328) in Southeast 

 Thailand; Lam Tong Lang near Pak Chong (USNM 365461, USNM 

 427374), Pak Chong (USNM 365462, USNM 365540, USNM 405907, 

 USNM 405910), Chantuk near Pak Chong (USNM 427370), Lat Bua 

 Kao near Pak Chong (USNM 419883), and Aranya Predesha (USNM 

 405862) in East Thailand; and Pran (USNM 419800), Peninsular 

 Thailand, represents mostly the moellendorffi color phase, with purple 

 tip and green deciduous periderm. A few specimens have the stripes 

 yellow brown rather than green and one shell (USNM 405907) has 

 the purple spu-al bands on the first five whorls, thus approaching the 

 typical color phase. Two shells (USNM 365540 from Pak Chong) 

 and one of three from Chantuk (USNM 427370) have white— not 

 purple — lips, calluses, and spires. The Chantuk shell has a purple 

 tip. The specunens from Sriracha show the same dwarfing, when 

 compared with Pak Chong examples, that are found in the forms of 

 A. atricallosus from the Sriracha area. Variation in size and shape 

 is summarized in table 1. 



