104 TRACHELIPODA. 



above, or with the margins disunited ; columella with one 

 or more plaits ; outer lip sometimes reflected, and in other 

 species simple. 



Section • Right lip outwardly reflected. 



«* Right lip plain and sharp. 



Auricula JudcB. — Judas' Auricula. Plate XIII. fig. 

 13. Oblong, conical, cylindrical, thick, with minute de- 

 cussated striae and granulations; whitish-brown; columella 

 with three plaits; aperture contracted in the middle. Two 

 and a fourth inches long. Inhabits the East Indies. 



Section II. — Animals with four tentacula. 



GewMS 73.— SUCCINE A— 2)ra;>arnaMrf. 



Generic Character. — Shell ovate, or ovato-conical ; aper- 

 ture very wide, entire, and longitudinal ; outer lip acute, 

 but not reflected, united below to the columella, which is 

 smooth and thin-edged ; no operculum. 



The shells of this genus never have their Up reflected or thickened, 

 and are thus distinguished from those of the genus Bulimus, to %vhich 

 they bear a strong resemblance. 



Succinea amphibia. — The Amphibious Succinea. Plate 

 XIII. fig. 14. Amber-coloured ; excessively thin and pel- 

 lucid ; spire short ; aperture expanded beneath, nearly ver- 

 tical. Three-fourths of an inch long. Inhabits the sides 

 of ditches and lakes in Europe. 



Genus 74.— ACHATINA Lamarck. 



Generic Character. — Shell ovate or oblong ; aperture 

 entire, elongated; outer lip acute, never reflected; columella 

 smooth, with its base truncated. 



Achatina virginea. — The Virgin Achatina. Plate 

 XIII. fig. 15. Smooth, grayish-white, with red and black 

 transverse bands ; the columella with one plait, rose-col- 

 oured ; volutions ventricose; inside of the lip bluish. One 

 and a half inch long. Inhabits South America and the 

 West Indies. 



