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 lapiduria. 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 870, 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. lactea, 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 lactea ; 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 
