inhabiting the United States. 36T 
under this name by the Abbé Brumati in his “ Ca- 
talogo Sistematico," published in 1836 ; but it cannot 
displace Mr. Say's species, which i been known 
by his name thirteen years. 
ii 
17. HELIX SPINOSA. 
Plate XI. fig. 2. 
H. testa lenticulari, carinatà, tenui, imperforata ; epidermide casta- 
nea hirsutiusculà ; spirà planulatà, subtus. convexà ; aperturà angus- 
lissimà ; columella dente unico, longo, laminato armatà; labro in- 
crassato, ad marginem superiorem angulato et subreflexo 
"ipium AND’ REFERENCES. 
Carocolla A Lea. Trans. Am. Phil. Soc, 
N.S, IV. 104. PL Xv., fig. 35, Ah 
DESCRIPTION. 
Animal. Not yet observed. 
Shell. Lenticular, with the upper surface much 
flattened, strongly carinated ; epidermis dark chest- 
nut color, with minute, projecting, hair-like process- 
es; whorls six, of nearly uniform width, and de- 
creasing very gradually from the aperture to the 
spire; suture distinct, not impressed ; aperture very 
narrow ; lip yellowish-white, thickened near its 
junction with the body-whorl, angulated and slightly 
reflected ; pillar-lip, with a long, yellowish, narrow, 
projecting tooth, extending from the umbilical axis 
to the angle of. the outer lip, and parallel with its 
thickened edge; base convex, idis the umbilical 
region slightly indented. 
