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. Ofthalicus melanostoma SHUTTLE WORTH, Notitise Malaco- 

 logieae 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 1'Am^r. Merid., p. 258, pi. 29, f. 



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



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

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



Shut tie worth's description under the name "0. melanostoma^ is 

 better than that of Hupe", 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." u 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 mill. 



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

 aperture is purple inside instead of white, and tin- 1 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 Shuttle- 

 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. 36a, 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, 





