56 MOLLUSCA. TRACHELIPODA. 



gular; reddish chestnut coloured ; spire very short ; aperture seven- 

 toothed. 1| inch long. Inhabits Asia. Bonan. 3, fig. 385. 



** With four tentacula. 

 Gen. 70. SUCCINEA, Lam. Helix, Lin. 

 Shell oval or ovate-conical ; aperture very large, entire, longer 

 than broad ; margin not reflected, and uniting below to a 

 smooth columella ; no operculum. 



S. amphibia, Lam. (H. succinea, Mull.) Shell ovate-oblong, very 

 thin pellucid, yellowish ; spire short ; aperture dilated, subverti- 

 cal. 9 lineslong. Europe, in moist places. Lister, pi. 123, fig. 23, a. 



Gen. 73. ACHATINA, Lam. Helix, Lin. 

 Shell oval or oblong ; aperture entire, longer than broad ; right 

 margin edged, never reflected ; columella smooth, truncated at 

 the base. 



This genus is distinguished by the right margin of the aperture never being reflect- 

 ed, by wanting the inner lip, and by the pillar being smooth and truncated at the 

 base. The animal has four tentacula, of which the two largest have the eyes at their 

 summit. 



A. perdix, Lam. Shell large, ovate-oblong, ventricose, decussated, 

 white, with the apex rose-coloured, and undulated with longitudi- 

 nal reddish bands; pillar purple violet ; lip white within. Near 

 6 inches long. Inhabits West Indies. 

 This is one of the largest terrestrial shells. The sutures of the spire are slightly 



crenated. 



A. Virginea, Lam. Shell conical, with parti-coloured transverse 

 bands ; columella rose-coloured ; lip within bluish. 2 inches long. 

 Inhabits South America. Bonan. 3, fig. 66. 



Gen. 72. BULIMUS, Lam. Helix, Lin. 



Shell oval, oblong, or turreted; opening entire, longer than 

 broad, with unequal margins, and disunited above ; columella 

 smooth, straight, without truncature or widening at the base. 



This genus is numerous in species, and includes terrestrial shells, some of which 

 Linnaeus had placed in his genus Bulla and Helix. When the animal has attained 

 its full growth it often forms on the outer margin of the opening a kind of ridge. 



B. ovatus, Lam. Shell subumbilicated, ovate, ventiicose, longitu- 

 dinally wrinkled, with the summit and outer lip rose-coloured, 

 and the pillar white. 4J inches long. Inhabits India. Lister, 

 pi. 1055, fig. 1. 



B. radiatus, Lam. (H. detrita, Mull.) Shell oblong-ovate, perfo- 

 rated, white, with longitudinal oblique gray or brown streaks, 

 and the aperture ovate. 1 inch long. Inhabits Germany, Italy, 

 &c Chem. ix. pi. 134, fig. 1225. 



B. hordeaceus, Lam. (H. obscura, Mull.) Shell small, oval-ob- 

 long, glabrous, fuscus horn-coloured ; aperture ovate ; margin of 

 the Hp reflected, white. 3 lines long. Inhabits Europe among 

 mosses and under stones. B Browns Illust. pi. 41, fig. 19. 



