LAND SNAILS FROM THAILAND — SOLEM 627 



4. Material from Kao Sabab at 300 (USNM 427324), 500 (USNM 

 427336), and 600 (USNM 427316) meters and Kao Bantad near Krat 

 (USNM 405858a) in Southeast Thailand represent an unnamed color 

 variation that differs in lacking the red subsutural band and in having 

 the radial streaks broadened on the last whorl, which is usually 

 darker in tone than the preceeding ones (pi. 2, figs. 7-8). It is thus 

 the opposite of the clausus variation where the last whorl is much 

 lighter than the preceding ones. Two of the thirteen specimens, 

 however, are yellow with only a single reddish spiral band on the 

 body whorl midway between the umbilicus and the periphery. The 

 Kao Sabab shells are slightly smaller than those of the Chiengdao 

 population (see table 1), and the population may be subspecifically 

 distinct. Nomenclatural recognition would be premature, since so 

 little material is available of this species. 



5. Two shells from Kao Pae Nam, Lomsak (USNM 427295), 

 Central Thailand, are doubtfully referred here. The slightly worn 

 adult (pi. 2, fig. 9) has a reddish subsutural line, a red suffusion 

 around the columella, no basal bands, broad wavy flames on the 

 first half of the body whorl with the last half monochrome. On the 

 upper whorls the radial streaks are bisected or trisected above the 

 periphery, partially to completely fused below. The shell is slender 

 (31.0 mm. high, h/d ratio 2.13, with 6% whorls) and approached the 

 A. semitessellatus and A. xiengensis variations in size and patterning. 

 Its identity is uncertain. 



Amphidromus fultoni Ancey, 1897 



Amphidromus fultoni Ancey, 1897, Nautilus, vol. 11, pt. 6, pp. 62-63 [Cochin, 

 China]. — Laidlaw and Solem, 1961, Fieldiana, Zool., vol. 41, no. 4, p. 565. 



A juvenile shell from Koh Prab near Bandon (USNM 361454), 

 Peninsular Thailand, has the same color pattern shown in the type 

 figures. More adequate collections may show that fultoni is only a 

 color phase of another species. 



Literature Cited 



Jacobi, Arnold 



1895. Anatomische Untersuchungen an Malayischen Landschnecken. 

 Arch. Naturg., vol. 61, pp. 293-318, pi. 14. 

 Laidlaw, F. F., and Solem, A. 



1961. The land snail genus Amphidromus: An annotated catalogue. 

 Fieldiana, Zool., vol. 41, no. 4, pp. 504-677, figs. 15-40. 

 Pilsbry, Henry A. 



1900. Manual of conchology, ser. 2, vol. 13, 253 pp., 72 pis. 

 Riley, J. H. 



1938. Birds from Siam and the Malay Peninsula in the United States 

 National Museum collected by Drs. Hugh M. Smith and William 

 L. Abbott. U.S. Nat. Mus. Bull. 172, 581 pp. 



