AMPHIDROMUS, GROUP II. 135 



1849, p. 136; Conchyl. Cab., p. 134, pi. 40, f. 6, and var., f. 5, 7, 

 8 : Monogr. iii, p. 320. MARTENS, Ostas. Landschn., p. 352 (ex- 

 clusive of syn. B. mundus}. B. perversus var. i y PFR., Monogr. ii, 



p. 39 Amphidrornus palaceus FULTON, Ann. Mag. N. H. (G), xvii, 



p. 72, with var. subaurantia, appressa and pur a. 



The coarse striation and non-appressed outer lip readily separate 

 this species from A. perversus and its allies. It differs from A. winteri 

 in the flatter stria?, less roughened and more glossy surface, etc., but 

 these species approach one another very closely. 



The color varies from sulphur or citron-yellow of the type (pi. 47, 

 figs. 1, 2) to somewhat orange-colored or pale salmon-pink with a 

 reddish peripheral band (pi. 47, figs. 4, 5); the latter being the var. 

 subaurantia of Fulton, which he incorrectly credits to von Martens. 

 Some specimens quite bridge over the gap to var. purus, and it is not 

 easy to tell which they are nearest to. 



In figures 13, 14 of pi. 46, two specimens (Clapp coll.) are illus- 

 trated showing variations. Fig. 13 is lemon yellow with white su- 

 tural border, a chestnut varix on the penult, whorl, and a pale reddish 

 line below the suture on the fourth whorl. Fig. 14 is pale cream 

 color with white suture, a purple-black varix on the last whorl, and 

 a dark subsutural band on several early whorls. 



White, sulphur-yellow and light reddish-brown specimens were 

 collected together, by G. Schneider, upon the island Nusa Gembangan 

 (also written Kembangan and Kambangan), on the south coast of 

 middle Java. (Martens, Nachbl., 1900, 17.) 



Var. purus Mousson. PI. 47, fig. 3. 



Solid, narrowly umbilicate or subperforate, glossy, white, faintly 

 yellow-tinted or roseate, strongly and irregularly striate ; whorls 

 6^-7^ ; peristome broadly expanded, especially the cohnnellar margin ; 

 a brown varix on the' ventral face of the last whorl, or on the pre- 

 ceding whorl. Alt. 54^, diam. 28^ mill.; alt. 49, diam. 26 mill. 



Java: Hakka,prov, Probolingo ; Pardana (Zollinger). 



B. purus Mouss., Moll. Java, p. 29, pi. 3, f. 2 PFR., Monogr. 

 viii. p. 41 ; Novit. Conch, iv, p. 33, pi. 116, f. 6. B. palaceus var. 

 b, PFR., Zeitschr. f. Malak., 1849, p. 136; Monogr. iii, p. 320. A. 

 palaceus v. pura FULTON, t. c., p. 73. 



In some specimens the brown varix is wanting, moved back upon 

 the penultimate whorl, or vestigial ; and in one before me from the 



