AMPHIDROMUS, GROUP XI. 195 







flames cut by a median yellow spiral, its lower or basal part having 

 three concentric zones (a yellow one between two brown ones). 

 Aperture suboval, somewhat angular below, whitish inside, the 

 margins joined by a very thiu and transparent callus ; columella 

 thick, rounded, white ; lip widely refiexed, white. Length 38, diam. 

 17^-18, length of the aperture 14-16 mill (Morlet). 



Laos : Plateau of Xieng-Moi, and the forest on the banks of the 

 Menain-Pinh (Pavie) ; Luang-prabang (Counillon) ; Prang ( W. L. 

 Abbott). 



Amphidromus xiengensis L. MORLET, Journ. de Conchyl., 1891, 

 p. 27, 232, 240, pi. o, f. 4. Ancey, Ann. Mus. d'Hist, Nat, Mar- 

 seille (Ser. 2), Bulletin, i, 1898, p. 134. DALL, Nautilus, xi, p. 37. 

 A- porcellanus var. xiengensis Morlet, FULTON, Ann. Mag. N. H. 

 (6), xvii, p. 79 (1896). 



Very closely allied to the Javan A- porcellanus, but somewhat 

 inure solid and a little larger, with a subsutural series of dots on the 

 upper whorls and a reddish line below the narrow pale sutural border 

 on the last whorl. The dark apical dot is also larger. I am quite 

 unable to agree with Fulton in his reference of this form and mtilti- 

 fasciatus to porcellanus and contrarius respectively. Unless the 

 whole porcellanus group be lumped, as some authors have treated the 

 perversus group, the present species (as herein constituted to include 

 color-varieties) has as good a right to stand as any of those recogni/<-d. 



Ancey reports specimens less elongated than the figured type, but 

 agreeing with it in coloration and other characters. 



I suppose "A. porcellanus Mouss." of Rochebrune (Bull. JSoc. 

 Philomathique de Paris, vi, 1881-2, p. 71), from the forests of 

 Owglu, Cochinchina, collected by M. Pierre, is really xiengensis. 



Var. multifasciatus Fulton. PI. 63, fig. 77. 



" Like maculatus, but more solid ; the umbilicus almost covered. 

 Pale lemon color, with oblique brown stripes interrupted by tltref or 

 four narrow yellow bands; a narrow red band just below and encirc- 

 ling the suture" (Fulton). Cambodia (British Museum). 



A. contrarius var. multifasciata Fui/rox, Ann. Mag. N, II. (6). 

 xvii, p. 78, pi. 7, f. 5 (January, 1^96). 



Var. clausus n. v. PI. 63, figs. 79, 80, 81, 82. 



Imperforate or nearly so, sinistral, thin but moderately solid, glossy. 

 Btriatulate. Buff, with oblique or longitudinal brown Jlames not reach- 



