AzECA. MOLLUSCA. PULMONIFERA. 269 



teal junction with the pillar. This species was confounded with the preced- 

 ing, by the bte Mr Montagu, as appears from his having sent me, on two 

 different occasions, specunens of P. pygnuBa for P. sexdentata,— It is not a 

 rare shell. 



b. Aperture of the shell destitute of teeth. 



93. E. cdentula. — Shell obtusely conical, of five or six whorls ; 

 peristome simple. 



Drajh 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, Kii-kald}'^, 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 anteallv 

 where it joins the pillar, it is a little reflected, so as to form a minute pillar- 

 cavitv- 



Gen. XXIV. AZECA.— Aperture of the shell oblique, nar- 

 row retrally. 



95. A. tridens. — Whorls six or seven, shghtly 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 ^th of an inch ; brown, translucent, glossy, with dis- 

 tinct striae. The aperture is rounded at the pUlar, becoming very narrow 

 and gutter-like at the junction of the body-whorl ; this last cuxumstance pro- 

 duces the appearance of a dark band along the somewhat indistinct separat- 

 ing line ; outer-lip with one tooth, inner-Kp 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 MuUer, 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. 



