23 



above by the penultimate whorls, nearly one-third the length of 

 the shell ; labium nearly transverse, color of the exterior part of 

 the shell ; labium equally and widely reflected, thick, white, um- 

 bilicus distinct. 



Inhabits Upper Missouri. Length one-fifth of an inch. 



Size of Paludina lapidaria. Lister represents a species on plate 

 22, fig. 19, which, although rather larger, may possibly be intended 

 for this species ; he denominates it " Buccinum exigium, rufum, 

 quinq orbium." This shell does not perfectly correspond in 

 character with Cyclostoma ; it is most probably a Pupa, and if so, 

 the specific name must be changed, as the present name is pre- 

 occupied in that genus. 



Journal of the Academy. Vol. ii., page 370, anno, June, 1822. 



Helix irrorata. — Shell imperforate, depressed, subglobular, 

 pale reddish brown, with very numerous small white spots, and 

 about four deeper brown obsolete bands ; whorls rounded, nearly 

 five in number, wrinkles obsolete on the body whorl, more distinct 

 on the spire ; spire depressed, convex ; suture declining much 

 near the mouth ; aperture on the side of the labrum, within some- 

 what livid ; labrum reflected but not flattened, and not abruptly 

 contracting the aperture, white before and yellowish behind ; near 

 the junction with the columella is a callus, which does not rise into 

 an angle. 



Length from the apex to the base of the columella, three-fifths 

 of an inch nearly. Greatest breadth one and one-tenth of an inch. 

 Inhabits Northumberland county, Pennsylvania. Cabinet of Mr. 

 William Hyde. 



This species may be compared with the H. lac tea, Muller and 

 Ferussac ; the spire is rather more prominent, the white spots, or 

 rather abbreviated lines are similar in form, size and number, but 

 its labrum preserves the same color with the exterior of the shell, 

 and the livid tint of the inner portion of the body whorl is very 

 pale ; the posterior face of the reflected labrum is immaculate, and 

 its callus base is not angulated ; the aperture is much less wide 

 than that of ladea; and in Mr. Hyde's specimen, a small fissure 

 remains near the umbilicus. It still more closely resembles a 

 variety of a shell which inhabits the Island of Candia, but that 



