294 MANUAL OF THE MOLLUSCA. 



Shell slender, usually sinistral, fusiform, multispiral, apertuie 

 ovate ; peristome acute, margins unequal, wall of the aperture 

 with one single j)lait ; columella simj^le. 



Animal snail-like ; teeth 20.20 ; rows 130. (Thomson.) 



Distribution, 8 species. Norway, Hungary, New Granada, 

 Tristan d'Acunha. The British species is found, yery rarely, in 

 Porto Santo, only on the highest peak, at an elevation of 1,C65 

 feet. (WoUaston.) 



Fossil, 1 species. Eocene. 



Sub-genus. Megaspira (elatior), Lea, PI. XII., Fig. 18. 



Shell dextral, with the columella transversely plaited. 



Distribution, 1 species. Brazil. 



Fossil, 1 species. Eocene — . Eheims. 



TORNATELLINA, Beck. > 



Etymology, diminutive (or patronymic termination) of torna- 

 tella. 



Type, T. bilamellata, Ant. 



Synonyms, Strobilus, Anton. Elasmatina, Petit. 



Shell imperforate, ovate or elongated ; aperture semi-lunar, 

 margins unequal, disunited ; columella twisted, truncated ; 

 inner lip l-j)laited. 



Distribution, 27 species. Cuba, South America, Juar) Fer- 

 nandez, Pacific Islands, New Zealand. 



Paxilltjs, a. Adams. 



Type, P. adversus. Ad. Borneo. 



Shell small, pupiform, sinistral, rimate ; spire pointed ; aper- 

 tui'e semi-ovate, ascending on the body-whorl ; inner lip 

 spreading, 1 -plaited, outer lijp exj)anded, notched in front. 



Clatjsilia, Draparnaud. 



Etymology, Diminutive of clausum, a closed place. 



Synonym, Cochlodina, Fer. 



Example, G. plicatula, Draparnaud (=0. Eolphii, Leach), 

 PI. XII., Fig. 19. 



Shell fusiform, sinistral ; aperture elliptical or pyriform, con- 

 '{;racted by lamellae, and closed when adult by a movable shelly 

 plate [clausium) in the neck. 



Animal with a short, obtuse foot ; uj^per tentacles short, lower 

 very small. C. bidensh.^^ 120 rows of 50 teeth; (7. nigricans 

 90 rows of 40 teeth each. 



Distribution^ 386 species. Europe, Asia, Africa, and Soutb 

 America. 



