294 MANUAL OF THE MOLLUSCA. 
Shell slender, usually sinistral, fusiform, multispiral, aperture 
ovate; peristome acute, margins unequal, wall of the aperture 
with one single plait; columella simple. 
Animal snail-like ; teeth 20.20; rows 130. (Thomson.) 
Distribution, 8 species. Norway, Hungary, New Granada, 
Tristan dAcunha. The British species is found, very rarely, in 
Porto Santo, only on the highest peak, at an elevation of 1,665 
feet. (Wollaston.) 
Fossil, 1 species. Hocene. 
Sub-genus. Megaspira (elatior), Lea, Pl. XII., Fig. 18. 
Shell dextral, with the columella transversely plaited. 
Distribution, 1 species. Brazil. 
Fossil, 1 species. Hocene—. Rheims. 
TORNATELLINA, Beck. » 
Etymology, diminutive (or patronymic termination) of torna- 
tella. 
Type, T. bilamellata, Ant. 
Synonyms, Strobilus, Anton. EHlasmatina, Petit. 
Shell imperforate, ovate or elongated; aperture semi-lunar, 
margins unequal, disunited; columella twisted, truncated ; 
inner lip 1-plaited. 
Distribution, 27 species. Cuba, South America, Juan Fer- 
nandez, Pacific Islands, New Zealand. 
Paxinius, A. Adams. 
Type, P. adversus, Ad. Borneo. 
Shell small, pupiform, sinistral, rimate; spire pointed; aper- 
ture semi-ovate, ascending on the body-whorl; inner lip 
spreading, 1-plaited, outer lip expanded, notched in front. 
CLAUSILIA, Draparnaud. 
Etymology, Diminutive of clausuwm, a closed place. 
Synonym, Cochlodina, Fér. 
Example, C. plicatula, Draparnaud (=C. Rolphu, Leach), 
i at ae, 19), 
Shell fusiform, sinistral; aperture elliptical or pyriform, con- 
tracted by lamellee, and closed when adult by a movable shelly 
plate (claustwm) in the neck. 
Animal with a short, obtuse foot ; upper tentacles short, lower 
very small. C. bidens has 120 rows of 50 teeth; C. nigricans 
90 rows of 40 teeth each. 
Distribution, 386 species. Europe, Asia, Africa, and South 
America, 
