180 LIGUUS CORONA. 



whorl. Aperture oblong, oblique, violaceous within, the inner mar- 

 gin deeply excavated in the middle ; columella black, twisted, thick- 

 ened, strongly truncate at base ; outer lip simple, acute, bordered 

 with blackish inside. Alt. 62, diam. 33 mill. 



Surinam, Demerara and British Guiana (Cuming coll.); Province 

 of Bahia, Brazil (Spix); Provinces of Santa Cruz de la Sierra and 

 Moxos, Bolivia (Orb.); Bolivia (Hupe). 



Bulimus incisus HUPE, in Castelnau, Exped. dans I'Ame'r. du Sud, 

 Moll., p. 36, pi. 9, f. 1 (1857). Orthalicus incisus PFR., Monogr. vi, 

 p. 202. Orthalicus melanostoma SHUTTLE WORTH, Notitise Malaco- 

 logicae i, p. 67 (exclusive of references to Ferussac). PFR., Monogr. 

 iv, p. 591 (exclusive of references to Ferussac, Swainson and Gray). 

 Bulimus regina ORB., Voy. dans PAmer. Me rid., p. 258, pi. 29, f. 



4 (living animal) REEVE, Conch. Icon., pi. 27, f. 168c Achatina 



melanostoma Swains., WAGNER in Spix, Testae. Bras., p. 16 (exclu- 

 sive of synonymy), pi. 8, f. 1 = Achatina perversa SPIX, 1. c. (1827). 



Shuttleworth's description under the name U 0. melanostoma" is 

 better than that of Huj^e, from which the above is taken, especially 

 in describing the coloration. " Purplish-flesh colored, becoming dull 

 chestnut toward the base, with a median purple-brown band articu- 

 lated with whitish, and a series of short blackish-violaceous streaks 

 between the band and the suture." " Columella callous, twisted, 

 thickened above, blackish-chestnut or purple ; aperture semi-oval, 

 purple deep within, becoming whitish toward the margin ; peristome 

 unexpanded, bordered with blackish-chestnut" He gives the dimen- 

 sions, alt. 78, diam. 30, length of aperture 34 mil!. 



It resembles L. perversus in the' dark-edged outer lip, but the 

 aperture is purple inside instead of white, and the articulated band 

 is not the peripheral (band 3 of the usual notation), as in perversus, 

 but the one above that (band 2); above it, dark streaks run to the 

 suture. 



The dextral form doubtfully referred to this variety by Sliuttle- 

 worth, and those cited by Pfeiffer, do not belong here. 

 L. REGALIS (Hupe). PI. 35, figs. 13, 14, 19 ; pi. 34, figs. 9, 10, 



11, 12; pi. 36#, figs. 26, 27 (specimens from Moyobamba); pi. 



33, figs. 3, 6. 



Shell usually sinistral, ovate or oblong conic, the surface 

 varying from striatulate to plicatulate. Ground color various, 

 but usually pale brown, or in denuded specimens, cream tinted, 



