72 



CONCHOLOGY. 



Univalve?. 

 Sinuo Uf, 



Antiquus, 



Siibaijti- 

 quatus, 



©arinatns, 



Gornevis, 



Linearis 



Purpnreus. 



Muricatus 



Bamfius ? 



Mem. Wet: Soc. vol. i. tab. 8. fig. 10. 



17. Sinuosus. Shell with six spires and six or seven 

 ribs on each, striated across ; volutions little raised ; at 

 the upper angle of the mouth a deep sinus; outer lip 

 slightly thickened by a rib; length three quarters of an 

 inch. 



Test. Brit. tab. 9. fig. 8. 

 Found at Weymouth by Mr Bryer, and at Dunbar 

 by Mr Laskey. 



18. Antiquus. Shell thick, strong, with eight whorls, 

 ventricose; faintly striated longitudinally and trans- 

 versely; mouth sub-oval; outer lip plana; inner lip re- 

 plicated ; inside yellowish ; length about six inches. 



Brit. Zool. tab. 78. 



Brit. Shells, tab. 31. 

 Common on the British shores. It is used in Zetland 

 as a lamp, the canal serves to hold the wick, the ca- 

 vity contains the oil and the shell is suspended horizon- 

 tally by a cord. 



19. Subantiquatus. Shell with eight whorls, striated 

 transversely, and obsoletely ribbed longitudinally, the 

 middle of each volution rising into a strong undulated 

 carniated ridge, sometimes two; mouth oval; canal 

 long ; outer lip even ; length three inches and a half. 



Brit. Shells, tab. 119. 

 Said to have been found on the Scottish coast. 



20. Carmatus. Shell oblong of six spires, with two 

 smooth spiral ridges; first whorl ventricose, aperture 

 semicircular ; length nearly four inches. 



Brit. Zool. tab. 77. 



Brit. Shells, tab. 109. 

 First figured and described by Mr Pennant, from the 

 Portland cabinet; it has since been found by Mr Laskey 

 at Dunbar. 



21. Corneus. Shell with eight strong taper spires, 

 transversely striated, and wrinkled longitudinally ; 

 whorls round, divided by a strong separating line; 

 mouth oval ; canal long, a little reflected ; length three 

 inches. 



Brit. Zool. tab. 76. fig. 99. 

 Brit. Shells, tab. 38. 



Common on the British shores. 



£2. Linearis. Shell rugose, with eight rounded and 

 strongly ribbed whorls, crossed by elevated strise, the 

 summits of which are purplish brown; mouth oval; 

 outer lip thickened at the back with a rib, crenated 

 within ; pillar lip smooth; length a quarter of an inch. 

 Test. Brit. tab. Q. fig. 4. 

 Brit. Shells, tab. 179. fig. 3. 



Frequent on the English coast, found also at Dun- 

 bar by Mr Laskey. 



23. Purpureas. Shell rugose, of a dark purple co- 

 lour, with spots of white, whorls ten, rounded, taper- 

 ing, furnished with twenty oblique ribs, crossed by 

 sharp ridges, mouth narrow, columella striated; length 

 live-eighths of an inch. 



Test. Brit. tab. 9. fig. 2. 



On the coast of Devon by Mr Montague, and in 

 Leith Roads by Mr Laskey.. 



24... Muricatus. Shell strong, rough, with six or se- 

 ven ventricose tuberculated volutions, tapering to a fine 

 point ; mouth oval, terminating in a long slender ca- 

 nal, outer lip dentated at. the edge; length half an 

 inch. 



Test. Brit. tab. 9. fig. 2: 



Found in Salcomb Bay by Mr Montagu, and at 

 Dunbar by Mr Laskey. 



25. Bamfius. Shell ventricose, white, ribbed longi- 

 tudinally, with acute plaits ; mouth ovate ; canal turn- 



ing a little to the left ; length about three-quarters of Univalves, 

 an inch. s— -y— ■»■ 



Brit. Shells, tab. 169, fig. 2. 

 Frequent on the Scottish coast, where it was first ob- 

 served by the Rev. Mr Cordiner at Banff. 



26. Minuhssimus. Shell with fine spirally striated Minutissi- 

 whorls, and remote ribs ; canal closed. mus- 



Lin. Trans, vol. iii. p. 65. 

 A minute species, found at Pembroke by Mr Adams. 



Genus XII. Strombus. 



Shell spiral, aperture much dilated, lip expanding, xir. 

 and produced into a groove, leaning to the left. Strombus. 



Obs. Young shells of this genus nearly resemble the 

 species of the genus Murex, being destitute of the ex- 

 pansion of the outer lip. 



1. Pes Pclecani. , Shell pyramidal, with ten tuber- Pes Peleca- 

 culated whorls ; outer lip expanded and quadrifid; ca- n '» 



nal produced; length about two inches. 

 Brit. Zool. tab. 75. 

 Brit. Shells, tab. 4. 

 Common on the British shores. 



2. Costalas. Shell with eleven dark brown volu- Costatus. 

 tions, tapering to a fine point, with close set ribs, and 



an elevated spiral line ; mouth suborbicular, outer lip 

 a little expanded, inner lip smooth, with a subcanal ; 

 length scarcely half an men. 



Brit. Shells, tab. 9*- 



Test. Brit. tab. 30, fig. 7- 

 In England rare; at the Sound of lona Mr Laskey; 

 and we have found it at St Andrews. 



Tribe 2. Entire. 



In this tribe, the base of the aperture is entire, and 

 not produced and grooved, as in the former. It con- 

 tains three genera, Turbo, Odostomia, and Lymnaa. 



Genus XIII. Turbo. 



Shell spiral, produced, mouth contracted, orbicular, XIII. Tuh«. 

 entire. BO - 



A. Imperforate, first whorl ventricose ; pillar-margin 

 of the mouth dilated. 



1. Littoreus. Shell strong with five whorls, first Littoreus, 

 large, others nearly flat ; outer lip thin, inner lip thick 



and strong ; length about an inch. 

 Brit. Shells, tab. 33. fig. 1. 

 Animal striped with black; tentacula two, setaceous, 

 annulated, with eyes at the base. Common on marine 

 rocks. 



2. Toiebrosus. Shell conical, with five ventricose Tenebro- I 

 spires ; apex obtusely pointed ; outer lip thin, spread- sus, 



ing a little at the lower angle ; diameter about a quar- 

 ter of an inch. 



Test. Brit, page 303. 

 Found on the English coast by Mr Montagu. 



3. Rudis. Shell strong, with five ventricose whorls, Rudis. 

 well defined by the separating line, and sometimes spi- 

 rally striated ; inner lip thick, a little reflected ; colour, 

 yellow or brown ; length three quarters of an inch. 



Brit. Shells, tab. 33. fig. 3. 

 Animal yellowish, with two setaceous tentacula of 

 the same colour, most commonly marked with a longi- 

 tudinal dusky streak on the outside. Not uncommon. 



4. Strialidus. Shell with five volutions, each termi- Saiatulus, 

 nated in a flat top; base wrought with spiral striae, 



which, towards the upper part, rise into three elevated 





