74 . 



CONCHO LOGY. 



Univalves. 

 Spiralis, 



Semicos- 

 tatus, 



Strigatus, 



Carinatu- 

 lus, 



Albulus, 



Subele- 

 gans, 



Subarcua- 

 tus, 



Margina- 

 tus, 



Indistinc- 



tus, 



Simillimui 



Elcgans, 



From Seasalter by Mr Walker 1 . 



23. Spiralis. ■ Shell pellucid, white, conical, with five 

 volutions ; the largest marked with transverse spiral 

 ridges, half way from the base, the rest finely ribbed 

 longitudinally ; separating line marked "with a fine spi- 

 ral ridge ; pillar lip turns inwards, and forms a sub- 

 denticle ; length a line. 



Test. Brit. tab. 12, fig. 9. 

 Found by Mr Montagu in Salcomb bay. 



24. Semicostatus. Shell short, conic, white, obtusely 

 pointed, with five rounded whorls, well defined by the 

 separating bne, and wrought with faint ribs, and five 

 obsolete transverse strias on the body whorl ; the ribs 

 do not extend to the lower part even of the body whorl; 

 pillar lip a little reflected ; length half a line. 



Test. Brit. tab. 21, fig. 5. 

 Found on the coast of Devon by Mr Montagu, and 

 at Dunbar by Mr Laskey. < 



25. Strigatus. Shell with three transverse ribbed 

 whorls, and a suboval mouth ; the colour opake, white. 



Test. Min. Rar. tab. 2, fig. 38. 

 From Seasalter by Mr Walker. 



26. Carinatulus. Shell opake, white, with seven ta- 

 per longitudinally ribbed spires ; mouth contracted, 

 marginated. 



Test. Min. Rar. tab. 2, fig. 44. 

 Found at Sandwich by Mr Walker, rare. 

 27- Albulus. Shell opake, with five longitudinal rib- 

 bed whorls ; aperture roundish, not marginated. 

 Lin. Trans, vol. iii. tab. 13, fig. 17, 18. 

 Found on the coast of Pembrokeshire by Mr Adam. 



28. Subelegans. Shell with six whorls, striated spi- 

 rally ; the ribs remote ; aperture oval. 



Lin. Trans, vol. iii. tab. 13. fig. 31, 32. 

 Found with the preceding species. 



29. Subarcuatus. Shell pellucid, white, with ten lon- 

 gitudinal ribbed whorls, a little curved towards the 

 point. 



Lin. Trans, vol. iii. tab. 13. fig. 27. 28. 

 ' Found with the preceding species. 



30. Marginatus. Shell white, subcylindric, strong 

 with six ribbed whorls, finely striated in a spiral direc- 

 tion ; pillar lip thickened, outer lip extremely thick and 

 rounded by a rib at the back ; length three eighths of 

 an inch. 



Mem. Wernerian Soc. vol. i. tab. 8. fig. 13. 

 Found by Mr Laskey at Dunbar. 



31. Indistinctus. Shell subcylindric, glossy white 

 with six spires, nearly fiat, but well defined by the se- 

 parating Hne, striated longitudinally and transversely ; 

 pillar lip smooth, and a little spread upon the colu- 

 mella ; length one-tenth of an inch. 



Test. Brit. p. 129. 

 Described by Mr Montagu from the Boysian cabi- 

 net. 

 , 32. Simillimus. Shell slender, white, with eight or 

 nine spires furnished with 14 ribs standing in the line 

 of the shell, bare and destitute of stria? ; length three- 

 eighths of an inch. 



Test. Brit. p. 136. 

 Found by Mr Laskey on the shores of Jura. 



D. Shells furnished with a pillar cavity, or umbili- 

 cus. 



33. Elegans. Shell with five ventricose whorls, 

 marked with strong spiral stria crossed by finer longi- 

 tudinal ones ; mouth orbicular, projecting on the pillar 



lip ; margin faintly marked by the striae ; behind the 

 pillar lip a sub-umbilicus ; operculum spirally striated ; 

 length five-eighths of an inch ; breadth three-eighths. 

 Brit. Z>ol tab. 82. fig. 110. 

 Found plentifully in England under moss and at the 

 roots of ferns. - 



34. Vinctus. Shell smooth, conic, with six rounded 

 volutions, of a rufous horn-colour; the lower spire mark- 

 ed with four or five chesnut coloured bands, with a 

 broad space between the three lower and the upper ; 

 outer lip very thin, inner lip thick ; pillar cavity small ; 

 length three-eighths of an inch. 



Test. Brit! tab. 20. fig. 3. 

 Found by Mr Montagu in Salcomb bay. 



35. Auricularis. Shell horn-coloured with five round- 

 ed volutions deeply divided by the separating line ; 

 mouth sub-oval, outer lip thin, inner lip much reflected 

 upon the body ; length three-eighths of an inch. 



Test. Brit. p. 308. 

 Found by Mr Montagu on the shore near Southamp- 

 ton. We have likewise observed it at Leith shore. 



36. Canalis. Shell hom coloured' with fine smooth 

 volutions, the lower one large in proportion to the rest, 

 pointed ; mouth sub-orbicular, outer Up extremely thin, 

 pillar lip broad, white, with a groove terminating in a 

 pillar cavity or 'umbilicus; minutely sub-reticulated. 



Test. Brit. tab. 12. fig. 11. 



On the British shores frequent. 



37- Subumbilicatus. Shell smooth, glossy, conic, yel- 

 lowish white, with five tumid volutions, the first occu- 

 pying above half the shell, rather obtuse, mouth oval, 

 outer lip even, inner lip a little reflexed, forming a sul- 

 cus or sub-umbilicus ; length one-eighth of an inch. 

 Pulteney's Dorset, tab. 18. fig. 12. 



Found by Mr Bryer on the shore of Weymouth ; we 

 have likewise observed it in great plenty at St An- 

 drew's. 



38. Pallidus. Shell smooth, white; slender with se- 

 ven spires, volutions not much raised, but well defined 

 by the separating line ; outer lip arcuated ; a faint du- 

 plicature on the pillar lip, with a small'umbilicus form- 

 ed by its reflexion ; length one-eighth of an inch. 



Test. Brit. tab. 21. fig. 4. 

 Found at Salcomb bay by Mr Montagu. 



39. QuadriJ'asciatus. Shell strong, smooth with four 

 volutions, the first whorl sub-carinated at the lower edge, 

 occupying more than half of the shell ; colour white, 

 usually marked with four faint brown bands on the 

 body, and sometimes two on the second spire, minute- 

 ly sub-reticulated; mouth sub-orbicular, thickened with- 

 in, but sloped to a sharp edge on the outer lip, pillar 

 lip grooved umbilicated ; length about a quarter of an 

 inch. 



Test. Brit. tab. 20. fig. 7. 

 Found on the British shores, from Devonshire to Zet- 

 land. 



40. Disjunclus. Shell slender, white, perfectly smooth 

 with six rounded volutions, divided by a broad and 

 deep line of separation, the bottom of which is flat or a 

 little concave ; pillar lip reflected, beneath which is a 

 small umbilicus ; length scarcely a quarter of an inch. 



Mem. Wernerian Soc. vol. i. tab. 8. fig. 3. 

 Found by Mr Laskey on Belton sands near Dunbar. 



41. Calear. Shell somewhat compressed, with four 

 whorls, the superior ones depressed, forming a flat sum- 

 mit ; round the larger and part of the second whorls, 

 are large smooth lanceolate spines, radiating in straight 

 lines from the shell, and thirteen in number, base con- 



Univalve*. 



Vinctus, 



Auricula- 

 ris, 



Canalis, 



Subumbi* 

 licatus, 



Pallidus, 



Quadrifas- 

 cialus, 



Disjunctus, 



Calear, 





