< ol;c.NA. 



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. I'i'J, diain. 33 mill. 



Surinam^ Demerara and British Gviana (Cuming coll.); Province 

 of Unhid, Jinnil (Spix); Provinces of Stmtu Cruz de In Sierra and 

 Mnxos, Bolivia (Orb.); /inlfn'a (Hupe). 



Bnlinuis iiicisns Hri'E, in Castelnau, Exped. dans 1'Amer. du Slid, 

 Moll., p. 3f>, pi. 9, f. 1 (1857). Orthalirns iitristts PFK., Monogr. vi, 

 p. 2o2. Orthalicits melanoffoma SHUTTLEWORTH, Notitia- Malaco- 

 logica- i, p. G7 (exclusive of references to Ferussac). PKK., Monogr. 

 iv, p. 591 (exclusive of references to F^russac, Swainson and Gray). 

 Jiit/iiniis regina OHH., Voy. dans PAmr. Merid., p. 25M, pi. 2 ( J, f. 

 4 (living animal). KKKVIC, Conch. Icon., pi. "27, f. 1 Mr Acfiatina 

 mdcmogtoma Swains., WAGNER in Spix, Testae. Bras., p. 1C (exclu- 

 sive of synonymy), pi. 8, f. 1 = Achatina perrersa Srix, 1. c. (1827). 



Shuttleworth's description under the name "0. melaaostotna," is 

 belter than that of Huj 6, from which the above is taken, especially 

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

 che>tnut toward the base, with a median purple-brown band articu- 

 lated with whitish, and a series of short blmktfh'Vtofaceout streaks 

 between the baml mid the suture." "Columella callous, twisted, 

 thickened above, blackish-chestnut or purple ; n/>ertnre semi-oval, 

 ]>nr}>le dt-ej) iriihin, liecoming whitish toward the margin ; peristome 

 unexpamled, bordered icitli btackish-e/i8tnvt." He gives the dimen- 

 sions, alt. 7H. diain. 30, length of aperture 34 mil!. 



It resemble^ I.. jii'rrt'rsHs in the dark-edged outer lip, but the 

 aperture is purple in>ide instead of white, and tin- articulated band 

 i- not the peripheral (band 3 of the ti.-ual notation), as in perm-sits, 

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

 <uiure. 



The dextral form doubtfully referred to this variety by Shuttle- 

 worlh, and tho>e cited by Pfeill'er. do not belong here. 



L. KKCAI.IS (Uupc). PI. 85, IL'<. 13, 1-4, I'.i; pi. :n. ligs. 1, H, 

 11, 12; pi. ''>*'/, tig*. 2 1 ', 27 (-pecini'-ns from .Movobamba); pi. 



:;:;. fig*. 3. ;. 



Shell usually sinislral, oval.- or oblong conic, the surface 

 \arving from >trialulale to plicalulate. (iround color various, 

 but u.-ually pale brown, or in denuded .-pecimens, cream tinted, 



