GASTEROPODA. 3 



2. HELIX PULCHELLA. MillL Tab. I, fig. 4, a c. 



HELIX PULCHELLA. Mull. Verm. p. 30, No. 232, 1773. 



PALUDOSA. Mont. Test. Brit. p. 440, 1803. 

 ZURAMA PULCHELLA. Leach. Moll. p. 108, 1819. 

 LUCENA PULCHELLA. Hartmcm. t. 1, fig. 6, 1821. 

 HELIX COSTATA. Flem. Brit. An. p. 263, 1828. 



AMPLEXIS PALUDOSIS. Brown. Con. Illust. pi. 41, f. 76, 77, 1827. 



CEENELLUS. pi. 41, f. 78, 79. 



HELIX MINUTUS. Say. Journ. Acad. Nat. Sc. I. 123, 1830. 



PULCHELLA. Gray. 2d edit, of Turt. Man. p. 141, pi. 5, fig. 49, 1844. 



S. Wood. Catalogue 1842. 



If. Testa minutd, orbiculato-depressd, umbilicatd; anfractibus 4, convexis, suturis 

 depressis ; labri margine crasso, albo, reflexo ; umbilico magno. 



Shell small, orbiculato-depressed, with about four volutions, finely marked with 

 lines of growth ; suture deep ; aperture subcircular ; peritreme thickened and reflected; 

 a large and open umbilicus, showing the volutions within. 



Diameter, ^ of an inch ; elevation, half the diameter. 



Locality. Red Crag, Bawdsey. Recent, Britain. 



The only specimen of this species in my cabinet was found in loose and disturbed 

 Crag ; it is, however, deeply tinged with the hydrous oxide of iron, having all the 

 appearance of a genuine Crag shell ; and as it is very abundant in the fluviatile deposits 

 of Stutton and Clacton, it was in all probability a living species during the Red Crag 

 period. 



3. HELIX ARBUSTORUM (?) Linn. Tab. I, fig. 2. 



HELIX ARBUSTORUM (?) Linn. Syst. Nat. p. 1245. 



Draparnaud. Moll. p. 38, t. 5, fig. 18, 1805. 



Turt. Man. pi. 3, fig. 25, 1819. 



Rossmasler. Iconog. p. 56, pi. 1, fig. 4, 1835. 



H. Testa subglobosd, perforatd, lavigata (?); spird obtusd ; anfractibus quinqne, subcari- 

 natis; aperturd oblique semilunari, labri margine refiecco ; umbilico obtecto. 



Shell subglobose and perforated ; smooth (?), with a short conoidal spire ; volutions 

 five, slightly convex above, and rather compressed beneath, very obtusely carinate ; 

 margin reflected, covering the umbilicus. 



Diameter, \ of an inch ; elevation, \ ditto. 



Locality. Mam. Crag, Southwold. Recent, Britain. 



The specimen figured is from the cabinet of Mr. Lyell, and is the only one I have 

 seen. I have assigned it to the well-known recent species, although it is considerably 

 altered in appearance, and differs from the general form of that shell in being more 

 depressed, and in the obtusely or roundedly carinated form of the volutions. I have, 

 however, some recent specimens as much depressed, and some which, in the young 

 state, show a carinated form of volution. It somewhat resembles H. Turonensis, but 

 that species is generally much larger, and the peristome of our shell is never so much 



