Azeca. 
m 
MOLLUSCA. PULMONIFERA. 
teal junction with the pillar. This species was confounded with the preced- 
ing, by the late Mr Montagu, as appears from his having sent me, on two 
different occasions, specimens of P. pygmcea for P. sexdentata.^lt is not a 
rare shelL 
b. A'pertwre of the shell destitute of teeth. 
93. E. edentula. — Shell obtusely conical, of five or six whorls ; 
peristome simple. 
Drap. Moll. 59. — Turbo Oftonensis, Sheppard.^ Linn. Trans, xiv. 155. — 
Among grass in woods, England. 
Length about a line, brown, pellucid, glossy, finely striated across. In 
1 822, Mr Miller sent me specimens of this shell from Bristol, and afterwards 
informed me of his possessing a variety having six volutions, with the lip 
slightly reflected, and a very minute tooth on the pillar — In the shell re- 
ferred to by Mr Sheppard, the whorls are seven in number. 
94. P. obtusa. — Shell nearly cylindrical ; peristome thick- 
ened. 
Drap. Moll. 63.—- Among moss near old walls. 
A shell corresponding with this species, except in size and the number of 
whorls, was sent me in 1813, by Mr Chalmers, surgeon, Kirkaldy, who found 
it in the parish of Balmerino, Fifeshire. It is not a line in length, while 
Draparnaud’s shell is about half an inch ; this has only five whorls, his has 
eight. The whorls increase suddenly to the third, and then continue nearly 
of the same size : they are rounded with a deep separating line ; aperture a 
little longer than broad ; the outer lip inclining to straight, and anteally 
where it joins the pillar, it is a little reflected, so as to form a minute pillar- 
cavity. 
Gen. XXIV. azeca. — A perture of the shell oblique, nar- 
row retrally. 
95. A. tridens. — Whorls six or seven, slightly raised ; form 
ovate. 
Turbo tridens, Pult. Dorset. 46. Mont. test. Brit. 338. t. xi. f. 2. Shep* 
pard^ Linn. Trans, xiv. 154. — In England and Scotland, rare. 
Length upwards of 5 th of an inch ; brown, translucent, glossy, with dis- 
tinct striae. The aperture is rounded at the pillar, becoming very narrow^ 
and gutter-like at the junction of the body- whorl ; this last circumstance pro- 
duces the appearance of a dark band along the somewhat indistinct separat- 
ing line ; outer-lip with one tooth, inner-lip with two long and two short 
teeth ; peristome entire, no pillar. cavity. This species was first observed 
by Dr Pultney, in Dorsetshire, and subsequently by different observers in 
other places. It is not the Helix tridens of Muller, or the Pupa tridens of Dra- 
parnaud. It was sent to me by Dr Leach, under the name of Azeca Maloni. 
The generic name I have adopted, but the specific one has been rejected as 
an unnecessary change,— Its true place will probably be found in the follow- 
ing genus. 
