224 



AMPHIDROMUS, GROUP XVIII. 



Subsp. AUREOCINCTUS Fulton. PI. 09, figs. 46, 47, 48. 



Shell more solid and often more elongated than adamsi ; yellowish 

 fawn, rather streaked below, fading to whitish on the upper part of 

 the last whorl and the spire, the suture with a golden border below ; 

 umbilical region golden or piuple. Aperture, lip and apex whiter 

 columella white or purple. 



Length 41, diam. 10 mill. 



Length 30, diam. 18 mill. 



Length 29, diam. 14 mill. North Borneo. 



Subsp. RUBIGINOSUS Fulton. PI. 09, figs. 49, 50. 



Imperforate or nearly so, oblong-conic, rather solid, striatulate, 

 hardly striated spirally. Dead-leaf brown, streaked with darker, 

 fading to whitish on the upper part of last whorl and on the spire. 

 Sometimes having irregularly bent brown stripe markings on the 

 spire and some spots at the periphery, the suture plain or with a 

 reddish brown line near it below ; apex white, sometimes with a dark 

 dot. Lip and columella white, the latter surrounded by an obscure 

 or blackish area. AVhorls 0^. 



Length 38, diam. 20, longest axis of aperture 171 mill. 



Length 33, diam. 17, longest axis of aperture 15^ mill. 



North Borneo. 



A. adamsi var. rubiyinosa FULTON, Ann. Mag. N. H. (0), xvii, 

 p. 84 (Jan., 1896). Bulimns la-vis, in part, DESK A YES, in Fer., 

 Hist. pi. 101, f. 11, 14, 15, 18. 



This very distinct variety resembles var. aureocinctus in solidity 

 and the dull coloration. It is sometimes irregularly striped above, 

 sometimes stripeless save for some basal streaks. The absence of a 

 sutural border is noteworthy. It is a wider shell than A. sinistrah's, 

 vith different columella and closed umbilicus. 



Subsp. HAMATUS Fulton. PI. 70, figs. 51-60, 



Minutely rimate or subimperforate, thin .; yellow or flesh colored, 

 with a subperipheral brown band from which short curved fames arise, 

 the surface above th m unicolored, or the flames may be continued 

 in irregular stripes to the suture, and some short ones intercalated 

 above; varying to forms without flames or without any markings. 

 But there is never a band bordering the suture belotc, as in adamsi. A 

 small purplish umbilical crescent or none. Periphery usually 



