ACHATINELLIDA. 65 
spiral, lamellar tooth on the inner lip of the aperture ; columella 
with a compressed fold. A. amena, Pfr. (xcix, 75). 
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, 76). 22 sp. 
APEX, Albers, 18(0. 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 slightly expanded. A. lugubris, Chemn. 30 sp. 
CARINELLA, Pfeiffer. Shell trochiform, carinated, coarsely stri- 
ate; columella twisted and plicate; outer lip simple. A. Kau- 
aiensis, Newcomb (xcix, 80). 
LAMINELLA, Pfeiffer, 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, 77). 70 sp. 
PERDICELLA, Pease, 1869. Shell dextral or sinistral, bulimiform, 
turreted or elongate-conical, imperforate, thinly striated ; colu- 
mella with inconspicuous or no plica; peristome simple, thin. 
A. Helena, Newcomb. 7 sp. 
LABIELLA, Pfeiffer, 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, 1847. Shell conical, elongated, thin, 
smooth, translucent; spire obtuse ; aperture rounded, angular 
above; columella callous. A. clara, Pfeiffer (xcix, 79’. 38 sp. 
EBURNELLA, Pease, 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 (xeviii, 
45). 
Yl elongated, turriculate ; whorls flattened, sometimes 
slightly shouldered ; columella strongly arcuated and contorted ; 
aperture small. 
TORNATELLINA, Beck, 1837. 
Syn.—Elasmatina, Petit, 1837. Lamellina, Pease,1860. Lam- 
ellaria, Liardet, 1876. 
Disir.—35 sp. Polynesia, Australasia, Juan Fernandez, Mauri- 
tius. JZ. globusa, Petit (ec, 97). 
Shell turbinate-oval or subtrochiform, fragile, pellucid ; colu- 
mella tortuous, truncated ; columellar lip with one or several 
teeth ; outer lip sharp, plicate within. 
