AMPHIDROMUS, GROUP IV. 153 



or the strigosus pattern ; all these intergrading completely. At Allu, 

 on the southern coast, 2 sinistral and 1 dextral shell, with brown 

 streaks on the base, the rest of the shell uniform light yellow. At 

 Bungi, on the Gulf of Mandar, 19 sinistral specimens with- light 

 yellow or nearly white ground-color, and typical " infrapictus " 

 markings. 



Dr. von Moellendorff reports the species from Tempe (Weber) 

 and from Bua Kraeng (Fruhstorfer), at 5000 ft. alt. Those from 

 the latter locality he describes as var. contracta v. Mlldff., differing 

 in the shorter, more ventricose shell, alt. 41, diam. 26 mill., a dextral 

 specimen, and alt. 40, diam. 27' mill., sinistral. 



JAVA. Besides the localities given above, Herr Gust. Schneider 

 collected the form infrapictus at the islands Bali and Bawean (the 

 latter N. E. of Java). (Martens, Nachrbl. 1900, p. 17). 



BORNEO Bock notes that interruptus is very abundant in the 

 Banjermassin district of southern Borneo, both dextral and sinistral, 

 and variously colored ; after rains the trees were quite spotted with 

 them. " Of the rare pure white variety only one specimen was ob- 

 tained." Specimens before me from Southeastern Borneo (pi. 50, 

 figs. 39, 40), collected by Doherty, agree with Hombron & Jacqui- 

 not's figures (Voy. au Pol Sud, pi. 8, f. 7, 8, as " B. mversus") of 

 a Bornean specimen. The shell is cream-white (yellow in their 

 figures) with much the pattern of var. emaciatus, chestnut stripes 

 which are weak above the periphery, stronger, wider and more 

 numerous below, breaking off abruptly at the small white umbilical 

 patch ; apex light ; lip recurved, adnate and black-edged behind ; 

 perforate or closed ; a black varix on the penult, whorl or none. 

 It differs from var. emaciatus chiefly in the shorter, more ventricose 

 form and consequently wider aperture. Occurs both dextral and 

 sinistral. This may be called var. borneensis. 



Subsp. EMACIATUS (Martens). PI. 53, figs. 77, 78. 



Shell dextral or sinistral, perforate or closed, conic, oblong, striat- 

 ulate, but little shining, pale sulphur colored (or white), having 

 longitudinal brown streaks which are more sparse and paler above, 

 but closer and darker on the base, and are not interrupted by a peri- 

 pheral light girdle ; and one or two black varices. Whorls 6^, but 

 little convex. Aperture less than half the shell's length, whitish 

 within ; peristome white, reflexed, recurved, and generally with a 



