AMPHIDROMUS, GROUP II. 137 



below the sutures, im perforate, and with the last whorl more or less 

 swollen. They are brilliantly glossy, and show faint traces of the 

 sculpture of A.palaceus, purus or appressus, though this is scarcely 

 noticeable unless looked for. The degree of inflation is variable. 

 Aperture pale yellow within, not white, as in perversus, and the spire 

 is distinctly attenuated near the apex. 



A. WINTERI (Pfeiffer). PI. 48, figs. 13. 14, 15. 



Shell either sinistral or dextral, openly perforate, ovate-conic, 

 rather ventricose, solid, hardly shining, strongly and irregularly 

 wrinkle-striate, and typically plicate, the folds wave-like, irregular, and 

 obsolete below the periphery ; white, pale straw- or sulphur-tinted or 

 pale rufous, usually unicolored but sometimes streaked. Whorls 6-7, 

 moderately convex. Aperture slightly oblique, whitish or pale yel- 

 low within ; peristome white, reflexed and recurved at the edge ; 

 columella thick, vertical ; parietal callus white. 



Alt. f>6, diam. 30 mill. (Pfr's type, figs. 13, 14). 



Alt. 47, diam. 26, longest axis of aperture 26^ mill. 



Alt. 43, diam. 22, longest axis of aperture 24 mill. 



Java (Winter); Tjikoya, Pardana arid Hakke, in the assistant- 

 residency Probolingo (Zollinger); Tjisurupan (Martens); Bandjar, 

 in Banjumas (F. Jagor). 



Bulimus winteri PFR., Zeitschr. f. Malak., 1849, p. 135 ; Conchyl. 



Cab., p. 134, pi. 40, f. 3, 4 ; Monogr. iii, p. 319 ; iv, 382; vi, 25 



MARTENS, Ostas. Landschn., p. 353, pi. 20, f. 4, 10 (var.), pi. 21, f. 

 12 (young). Amphidromus winteri FULTON, t. c., p. 74. A. winberi 

 Pfr., Nevill, Handl. Moll. Ind. Mus., i. p. 126. Bulimus mycros- 

 toma HASSELT, Algemene Konsten Letterbode, 1823 ; Bull, des Sci. 

 Nat. et de Geol. (2 sect.), iii, 1824, p. 83, and an unpublished plate 

 in Berl. Mus. 13, f. 2, according to von Martens. 



Typical winteri is very strongly sculptured with deeply-cut wrinkle- 

 striae and coarse, wave-like folds, and is of a uniform pale color; but 

 the variations apparently include forms hardly more striate than A. 

 javanicus, and without undulations. The material before me consists 

 of several extreme forms only, from which an independent judgment 

 cannot be formed ; but I am disposed to agree with von Martens, who 

 claims that these several forms being united by intermediate exam- 

 ples, do not admit of specific discrimination. In a lot of 20 speci- 

 mens from one locality, collected by Jagor, he found 11 white, 4 

 dextral and 7 sinistral. 



