HELIX. SNAIL-SHELL. 63 
into a pyramidal form ; but its diameter is mych less, and 
there are seven volutions. 
Although we can hardly venture to offer these two last 
extraordinary shells as distinct and permanent species, 
their singular excentricity, nevertheless, deserves a deter-; 
minate record. In the number of volutions, and in many 
other respects, they both differ from the H. scalaris of 
Muller and other authors, v. m. 
i 46. Helix bifasciata. Double-handed Snail-shell. 
Later, pi. 19. f. 14— Dorset Cat. pi. IS. f. 8 and 10— 
Pennant, pi. 85. f. 5. 
Turbo fasciatus. Donovan, pi. 18. f. 1— Montagu , pi. 22. 
u. ' 
Shell taper, thin, semitransparent, coarse, wrinkled lon¬ 
gitudinally, greenish-wliite, with longitudinal brown or 
chesnut stripes, which are generally broken so as to ap¬ 
pear like interrupted bands, and are often confluent on the 
larger volution, forming a band or two, and sometimes they 
are almost entirely obliterated: spires nine, a little rounded, 
and terminating in a rather acute point: aperture nearly* 
oval, the margin thin, reflected a little on the pillar and 
forming a small hollow behind it: length nearly three 
quarters of an inch; breadth not two lines. 
Sandy maritime pastures, v , v. 
47. Helix octona. Taper Snail-shed. 
Lister, pi. 20. f. 15— Linn. Trans, viii. pi. 5. f. 10. 
Shell very slender, ending in an obtuse point, glossy 
white or very light liorn-color: spires eight, a little, 
rounded and well defined, smooth or very obscurely striate 
longitudinally: aperture somewhat orbicular*, thin and not 
reflected 3 the pillar-lip a little reflected and producing a 
very obscure and hardly perceptible hollow "behind it: 
length five eighths of an inch j breadth about one eighth. 
From the next it differs in color, in being of a more taper, 
form and ending more obtusely, in the form of the aperture 
and slight reflexion of the pillar-lip. From H. Lackhamen- 
sis it is immediately discriminated, by having no trace of a 
reflected or margined aperture. 
Supposed, by Dr. Pulteney, to have been found in Dor¬ 
setshire. ' ■ . 
g 2 48. Helix 
