ACHATINELLIDJE. 65 



spiral, lamellar tooth on the inner lip of the aperture ; columella 

 with a compressed fold. A. amcena^ Pfr. (xcix, 15). 



AMASTRA, H. and A. Adams, 1853. Shell generally dextral, 

 striate or rugose, last whorl ventricose, dull-colored, brown; col- 

 umella with an anterior spiral, lamelliform plication ; lip slightly 

 thickened. A. tristis, Fer. (xcix, 16). 22 sp. 



APEX, Albers, 1860. Short conic, solid, smooth or striate; 

 upper whorls plane, the apex acute and discolored, the others 

 tumid, margined ; aperture irregularly quadrangular, with mod- 

 erate columellar tooth ; the peristome thinly labiate, acute or 

 rarely slightl}^ expanded. A. lugubris, Chemn. 30 sp. 



CARiNELLA, Pfeifler. Shell trochiform, carinated, coarsely stri- 

 ate ; columella twisted and plicate; outer lip simple. A. Kau- 

 aiensis, Newcomb (xcix, 80). 



LAMiNELLA, Pfeitfcr, 1852. Shell conical, turriculated ; spire 

 somewhat acute ; last whorl ventricose ; columella tortuous, 

 forming a large, lamellar fold ; outer lip simple, sharp. A.picta, 

 Mighels (xcix, 17). 10 sp. 



PERDICELLA, Pease, 1869. Shell dextral or sinistral, bulimiform, 

 turreted or elongate-conical, imperforate, thinl3r striated ; colu- 

 mella with inconspicuous or no plica; peristome simple, thin. 

 A. Helena, Newcomb. 1 sp. 



LABIELLA, Pfeiffcr, 1852. Shell oval-conical ; inner lip callous ; 

 outer lip thickened ; with a callosity on the middle of its inner 

 margin. A. dentata, Pfr. 6 sp. 



LEPTACHATiNA, Gould, 1841. Shell conical, elongated, thin, 

 smooth, translucent; spire obtuse; aperture rounded, angular 

 above; columella callous. A. clara, Pfeiffer (xcix, 19). 38 sp. 

 , EBURNELLA, Peasc, 1869. Shell solid, smooth, polished, 

 oblong-ovate, with a twisted columellar plica ; lip not thickened ; 

 apex somewhat obtuse or acute. A. casta, Newcomb. 9 sp. 



Carelia, H and A. Adams, 1853. 



Distr. — 8 sp. Sandwich Islands. C. cochlea, Reeve (xcviii, 

 45), 



Shell elongated, turriculate ; whorls flattened, sometimes 

 slightly shouldered ; columella strongly arcuated and contorted ; 

 aperture small. 



TORNATELLINA, Bcck, 1831. 



Syn. — Elasmatina, Petit, 1831. Lamellina, Pease, 1860. Lam- 

 ellaria, Liardet, 1816. 



Distr. — 35 sp. Polynesia, Australasia, Juan Fernandez, Mauri- 

 tius. T. globusa, Petit (c, 91). 



Shell turbinate-oval or subtrochiform, fragile, pellucid ; colu- 

 mella tortuous, truncated ; columellar lip with one or several 

 teeth ; outer lip sharp, plicate within. 



