136 AMPHIDROMUS, GROUP II. 



collection of G. H. Clapp, a couple of brown stripes precede the varix 

 stripe. The size varies within wide limits, some being as small as 

 43 mill. long. 



Var. appressus ('Mousson' Martens). PL 47, fig. 7 ; pi. 46, fig. 15. 



Shell dextral [or sinistral], nearly covered perforate, conic-elon- 

 gate, solid, closely, regularly and delicately striate, glossy, pale isa- 

 belline, whitish above, lacking varices. Spire long, almost regularly 

 conical, the apex rather acute, buff; suture oppressed, white, more 

 distinctly striate. Whorls 7 to 7-|, a trifle convex, the last two-fifths 

 the total length, not inflated, rounded basally. Aperture rather ob- 

 lique, oblong-semi-elliptical, whitish and glossy within ; peristome 

 callous, white, broadly expanded and narrowly revolute, the margins 

 joined by a rather thick milk-white callus ; right margin regularly 

 and slightly arched, columellar margin slightly receding, somewhat 

 twisted and very much dilated above, almost appressed, nearly clos- 

 ing the narrow umbilicus. Length 5054, diam. 23 mill. (Pfr.). 



Java (Zolliriger); at Gunung Gedeh (Strubell). 



Bulimus appressus Mousson in coll., MARTENS, Ostas. Landschn. 

 p. 353 (1867) PFR., Monogr. vi, p. 26 (quoting v. Mart.); Novit. 

 Conch, iv, p. 34, pi. 116, f. 4, 5 ; Monogr. viii, p. 41 Amphidromus 

 appressus (v. Mts.) BOETTGER, Bericht Senck. naturforsch. Ges. in 

 Frankfurt a. M., 1890, p. 145, pi. 5, f. 8. A. polaceus var. appressa 

 (Mouss.) Pfr., FULTON, Ann. Mag. N. H. (6), xvii, p. 72. 



The type was dextral (pi. 47, fig. 7), but Boettger figures a 

 sinistral example from Gunung Gedeh (pi. 46, fig. 15), of a pale 

 sulphur color. I have not seen the species, which may well prove 

 to be, as Mr. Fulton holds, a small-mouthed, elongate variety or 

 subspecies of A. palaceus. 



Subsp. TENER Martens. 



A delicate, thin shell, with the last whorl comparatively large ; 

 pale brimstone yellow. Alt. 46, diam. 28, aperture 25^ mill. 

 (Martens). Both sinistral and dextral. 



Bulimus perversus tener MARTENS, Ostas. Landschn., p. 350 

 ?? Bulimus aureus SWAINS., Zool. Illustr. i, pi. 47, upper and lower 

 figures. 



I refer to this form, which was described as a variety of perversus, 

 a series of shells (pi. 46, figs. 16, 17, 18) from Java which are 

 thinner and far paler than A. perversus, whitish toward the apex and 



