166 MANUAL OF THE MOLLUSCA. 'h 



Sijn. Brachypus, Guild. Siphonostoma, Sw. 1 



Shell cylindrical or pupiform, sometimes sinistral, many- whirled, apex of 

 the adult truncated, aperture round, peristome continuous, expanded, i 



Animal similar to clausilia ; foot short, oral tentacles minute. 

 Distr. 50 sp. W. Indies 35, Mexico 5, Texas 2, S. America 1. 



Bal^ia, Prideaux. 



Type, B. perversa. PI. XII. fig. 21. Syn. Fusulus, Pitz. 



Shell slender, usually sinistral, fusifonu, multispiral, aperture ovate ; pe- 

 ristome acute, margins unequal, wall of the aperture with oue slight plait ; 

 columella simple. 



Animal ixml-Yike. ; teeth 20.20; rows 130 (TV^owz^we). 



Bistr. 8 sp. Norway, Hungary, New Granada, Tristan d'Aeunha. The | 

 British sp. is found, very rarely, in Porto Santo, only on the highest peak, at ! 

 an elevation of 1,665 feet. {Wollaston.) 



Sub-gemis. Megaspira (elatior) Lea. PI. XII. fig. 18. Shell dextral, \ 

 with the columella transversely plaited. Distr. 1 sp. Brazil. Fossil, 1 sp. j 

 Eocene — . Rheims. I 



TOENATELLINA, Beck. t 



Etym. Diminutive (or patronymic termination) of tornatella. ^ 



Type, T. bilameUata, Ant. Syn. Strobilus, Anton. Elasmatina, Petit. 



Shell imperforate, ovate or elongated ; apertm-e semi-lunar, margins un- 

 equal, disunited ; columella twisted, truncated ; inner lip 1 -plaited. 



Bistr. 11 sp. Cuba 1, S. America 2, Juan Fernandez 2, Pacific Ids. 5, 

 N. Zealand 1. i 



Paxillus, a. Adams. 



Type, P. adversus. Ad. Borneo. 



Shell small, pupiform, sinistral, rimate; spire pointed; aperture semi- 

 ovate, ascending on the body-whirl; inner lip spreading, 1-plaited, outer lip 

 expanded, notched in front. 



Clausilia, Draparnaud. 1 



Etym. Dimin. of clausuvi a closed place. Syn. Cochlodina, Per. ? 



Ex. C. plicatula, Drap. ( = C. Rolphii, Leach). PI. XII. fig. 19. 



Shell fusiform, sinistral ; aperture elliptical or pyriform, contracted by j 

 lamellEe, and closed when adult by a moveable shelly plate {clausmm) in the J 

 ueck. i| 



Animal with a short, obtuse foot; upper tentacles short, lower vei-y 

 small. C. hidens has ] 20 rows of 50 teeth ; C. nigricans 90 rows of 40 , 

 teeth each. ! 



Bistr. Above 200 sp. Europe 146, Asia 48, Africa 4, S. America 3. ! 



Fossil, 20 sp. Eocene — . Brit. France. Coal-strata, N. Scotia. {Lyell.) j 

 C. maxima, Grat. Miocene, Dax is two inches in length. 



