inhabiting the United States. 371 
^ 19, HELIX TOWNSENDIANA. 
Plate KITT. 
H. testå abicnikiecoa esk, cornea-luteà, rugosa, ner ; aper- 
tura sub-rotundata ; labro albo, reflexo ; columella le 
Synonyms AND RzrrRENCEs. 
Helix a E Lea. dois; Am. Phil. ct 
4 VL 9. PL XXIII. ae 80. 
Description. 
Animal. Not pot observed. 
Shell. Obtusely convex; epidermis yellowish 
horn-color, rough and corrugate on the body-whorl ; 
suture distinct ; whorls five and a half, with minute 
longitudinal stri», which can. . scarcely. be traced by 
the eye, and coarse oblique ones ; body-whorl large 
and voluminous ; s aperture - ‘somewhat: rounded ; lip 
white, fully reflecta: at the base, and but partially so 
towards its superior part; umbilicus open, deep, a 
little contracted by' the reflection of the. lip; base 
convex and turgid. : 
Greatest transverse diameter one inch and three 
eighths. 
GEOGRAPHICAL ial cali, Inbábits the neigh- 
bourhood of the Wahlamat, near its junction with 
Columbia Sven whence it was brought by Mr. 
Nuttall. 
Remarks. The upper surface of this shell resem- 
bles, in. general aspect, large and. coarse specimens of 
. Hzuix. aibólabris, Say. The number and arrange- 
