AMPHIDROMUS, GROUP XVIII. 223 



Form ornutus Fulton (pi. 09, fig. 41). " Ground-color either yel- 

 low or reddish-brown, with a broad spiral hand of short oblique equi- 

 distant dark-brown stiipes at the periphery, continued above at the 

 suture ; lip, columella and umbilical area pink." 



Form luteofasciatus Fulton (pi. 69, figs. 39, 40). Yellow bands 

 below the suture and above and below the periphery, and a pale hand 

 around the purple columellar tract, the intervals between bands of a 

 peculiar drab or bluish color, sometimes with distant white spots 

 alonrr the peripheral band ; two series of brown spots on some early 

 whorls ; a dark apical dot. Lip and columella pink. Allied to the 

 following. 



Form superbns Fulton (pi. 09, fig. 43). "A most beautiful variety 

 of a bluish-grey ground-color, ornamented with three spiral color- 

 bands, a pink one just below the suture, one, either yellow or pink, 

 at the centre of the whorls, and the third (a yellow one) at the lower 

 part of the last whorl ; on the upper whorls are oblique stripes, which 

 are interrupted by the spiral bands ; lip, columella and umbilical 

 area pink." (Fulton.) 



Form manysianus Pilsbry (pi. GO, figs. 44, 45). Short and ventri- 

 cose, thin ; whitish with yellow suffusion toward the base and lip, ami 

 a golden subsutural band ; marked with deeply branching brown 

 flames interrupted on the base by a yellow belt, the columellar area 

 reddish. Another color-form has the same ground-color, but with 

 merely traces of the flames appearing as spots above the suture and 

 on the upper part of some early whorls, the last whorl with a sub- 

 peripheral and a basal dark interrupted line. 



Island of Man g si, Balabac Strait. 



Bornean forms. 



Form rnfocinctus Fulton (pi. 09, fig. 42). " Ground-color fawrt 

 or light In-own, with three pink spiral bands, one immediately below 

 the suture, and the other two above and below the periphery, the 

 11 1 iper one continued above." Columellar patch carmine, lip and 

 columella pink. 



Form inornalus Fulton. PI. G9, fig. 4">. 



" Thin, pale lemon color, first three Avhorls semitransparent, and 

 with some oblique and more or less indistinct brown stripes; suban- 

 gulute at the periphery ; suture slightly channelled ; lip and columella 

 white ; umbilical area sometimes tinged with pink." 



North Borneo, 



