156 AMPHIDKOMUS, GROUP V. 



47, greater diam. 28, lesser 24, aperture 23 J mill, long, 19^ wide. 

 Three sinistral examples, one dextral. 



Bali : Bulelwg and Djembrana (Zollinger, in coll. Mousson). 



Bulimus mitra MARTENS, Preussisohe Exped. nach Ost-Asien. 

 Landschnecken, p. 343 (1867). 



According to von Martens, this form may lay claim to uniting 

 sultanus and interruptus, in. which case emaciatus must also be added. 

 B. mitra has not been figured, nor noticed by other authors hitherto, 

 5. Group of A. j onus. 



The species grouped here are not closely allied, but all of them 

 have spiral bands, at least in some specimens. A. j 'anus has the 

 parietal wall blackish ; A. enganoensis is distinguished chiefly by its 

 broad columellar margin, and A. martensi is a short, obese species, 

 with broad peristome. 



A. JANUS (Pfeiffer). PI. 58, figs. 14, 15, 16, 17, 18. 



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

 solid, glossy, nearly smooth. Yellow with a white subsutural band, 

 the spire with two brown or hoary-brown bands, one subsutural, the 

 other fubmedian ; the last whorl with subsutural and supraperipheral 

 pale green bands ; often wanting, and a green or brown-green base ; 

 varices narrow, black brown, broadly yellow -bordered on both sides, 

 interrupting the spiral bands and basal patch ; two or three earlier 

 whorls uniform yellow or whitish. Spire rather high-conic ; whorls 

 about 6^, convex. Aperture small, slightly oblique, pale-yellow or 

 whitish within, and showing chestnut bands or basal patch, this color 

 stopping far short of the lip ; peristome white, reflexed and recurved 

 at the edge, thickened ; the columellar margin dilated above ; 

 parietal callus blackish chestnut. 



Alt. 47, diam. 24 mill. 



Alt. 39, diam. 21, longest axis of aperture 20 mill. 



Alt. 42, diam. 21, longest axis of aperture 21 mill. 



Burmah (Coll. A. N. S. P.); Mergui (Theobald). 



Bidimus janus PFR., P. Z. S. 1852, p. 85 ; Conchyl. Cab., p. 156, 



pi. 48, f. 1-4; Monogr. iii, p. 310; iv, 374; vi, 20; viii, 24 



GASSIES, Moll. terr. Nouv.-Caledonie, i, p. 49, pi. 5, f. 5 Canis- 

 trum janus FFLD. Cochloslyla janus SCHAUFUS in Paetel Amphi- 

 dromus janus CROSSE, J. de Conchyl. 1894, p. 172. NEVILL, 

 Handlist Moll. Ind. Mus., i, p. 126. Bulimus atricalhsus Gld., 



