



CONCHOLOGY. 



the three first belong 



Univalve*, tlie Canaliculated and the Entire 



"— —y"—' to the former, and the remaining genera to the latter 



Tribe 1. Canaliculated. 



In shells of this tribe, the mouth at the base termi- 

 nates in a grooved beak, more or less produced. The 

 tribe contains three genera, Buccinum, Murex, and 

 Strombus, which, in many respects, are nearly allied to 

 one another. 



X. Bucei- 



NUM. 



Undatum, 



Glaciale, 



Lapillus, 



Reticula- 

 rum, 



Macula, 



AmV.igu- 

 urn, 



He pari. 

 cum, 



Genus X. Buccinum. 



Shell spiral, gibbous ; produced, aperture ovate, end- 

 ing in a short canal leaning to the right ; pillar lip ex- 

 panding. 



1. Undatum. Shell with seven or eight ventricose 

 spires, with waved ribs, striated transversely and longi- 

 tudinally, strong, sometimes five inches in length. 



Brit. Zool. tab. 73, 74.j 

 In its young state, this shell has an obtuse globular 

 apex, and has been described as a distinct species by 

 some authors. Common on all our shores. 



2. Glaciale. Shell tapering, livid brown, with about 

 nine spirally striated volutions, the top of each spire 

 furnished with waved ribs ; body whorl usually furnish- 

 ed with a small ridge or keel ; aperture ovate, outer lip 

 thin, spreading ; length about two inches. 



Brit. Shells, tab. 154. 

 Found by Mr Agnew among the Orkney Isles. 



3. Lapillus. Shell thick, with five or six strongly 

 striated spires; outer Up waved, or subdenticulated ; 

 pillar lip smooth, replicated ; length seldom above two 

 inches. 



Brit. Zool. tab. 72. fig. 89. 



Brit. Shells, tab. 11. 

 This species varies in appearance in different stages 

 of its growth. It is placed by Lamark in his genus 

 Purpura. It is common on the rocks on every part of 

 the coast. The animal yields an unchangeable crimson 

 dye. 



4. Reliculalum. Shell with seven or eight ribbed 

 spires, tapering to a fine point, wrinkled across, decus- 

 sated ; aperture suboval ; outer lip even, denticulated 

 within ; length about an inch and a half. 



Brit. Zool. tab. 72. fig. 92. 

 Brit. Shells, tab. 76. 

 Not uncommon in England and Scotland. 



5. Macula. Shell with six or seven ribbed spires, 

 transversely striated ; apex pointed ; mouth suborbicu- 

 lar ; outer lip globose at the back ; denticulated within; 

 inner lip replicated, and faintly denticulated; outer 

 edge of the canal purplish ; length about half an inch, 

 breadth a quarter. 



Test. Brit. tab. 8. fig. 4. 

 Common on the coasts of England and Scotland. 



6. Ambiguum. Shell subconical, faintly striated trans- 

 versely, with six to fifteen ribs ; mouth suborbicular ; 

 outer lip thickened, slightly denticulate ; inner lip fold- 

 ed back ; length about half an inch. 



Test. Brit. tab. 9. fig. 7. 

 Not frequent ; found at Weymouth and Portland. 



7. Hepnticum. Shell brownish, with seven or eight 

 ribbed volutions, a transverse depression near the top 

 of each of the spires, which are tumid, and strongly 

 divided ; apex sharp ; outer lip thick, turning inwards 

 to an edge ; inner lip folded back ; about an inch in 

 " "gth. 



Test. Brit. tab. 8, fig. I. 



Univalves. 



Bilinea- 

 turn. 



Perdii, 



Lineatum. 



Cinctum,- 



Found at Purbeck and at Weymouth, by Dr Pulte- 

 ney. 



8. Bilineatum. Shell ovate, smooth, girded with 

 two to four bands of brown spots, the upper part set 

 round with two series of tubercles ; mouth large, sub- 

 oval ; outer lip slightly dentated, inner lip rugose and 

 granulated. 



Brit. Zool. App. tab. 79- bottom figures. 



Found at Weymouth by Mr Pennant. 



9- Perdix. Shell suboval, with five or six volutions, 

 the first large and tumid, the others small in propor- 

 tion, marked with small transverse ridges; mouth large 

 oval, outer lip thin plain. 



Test. Brit. tab. 8. fig. 5. 



Found at Weymouth by Dr Pulteney and Mr Bryer, 

 and on Iona by Mr Laskey. 



10. Lineatum. Shell smooth conical, with five or six 

 spires, regularly banded with alternate spiral lines of 

 brown and white ; apex pointed ; mouth oval ; length 

 a quarter of an inch, breadth one-eighth. 



Brit. Shells, tab. 15. 

 On the English shores ; rare. 



11. Cinctum. Shell white conical, marked with a 

 fine thread-like girdle of a rufous brown colour round 

 the middle of each spire, volutions six or seven, nearly 

 even, finely and closely ribbed, obsoletely striated across; 

 apex sharp ; mouth narrow, outer lip thick, toothed 

 within ; length scarcely a quarter of an inch. 



Test. Brit. tab. 15. fig. 1. 

 Found by Mr Bryer on the shore near Weymouth. 



12. Minimum. Shell with fine reticulated taper spires, 

 mouth oval, both lips smooth ; length about two-tenths 

 of an inch. 



Test. Brit. tab. 8. fig. 2. 

 Found on the coast of Devon by Mr Montagu, and 

 at Dunbar by Mr Laskey. 



13. Terrestre. Shell with six slender smooth white 

 spires, terminating in an obtuse point ; mouth oblong 

 suboval, outer Up thin, even, pillar Up thickened; length 

 nearly a quarter of an inch. 



Test. Brit. tab. 8. fig. 3. 

 Found in England, rare ; at Dunbar by Mr Laskey. 



14. Obtusulum. SheU with three bellied spires, and 

 an oval aperture, opake, white. 



Test. Min. Rar. tab. 2. fig. 59. 

 A microscopic species found at Feversham creek by 

 Mr Walker. 



15. Breve. Shell white, opake, short, with fine 

 whorls, longitudinally ribbed, and transversely stria- 

 ted. 



Lin. Trans, vol. iii. tab. IS. fig. 3. 4. 



16. Minutum. SheU white, opake, with three longitu- 

 dinally ribbed whorls. 



Lin. Trans, vol. iii. tab. 13. fig. 5. 6. 



17. Laeve. SheU white, opake, mouth oval, spires 

 three, smooth, the first ventricose. 



Lin. Trans, vol. iii. tab. 13. fig. 7- 8. 



18. Obtusissimum. SheU white, with tlrree smooth 

 spires, mouth contracted. 



Lin. Trans, vol. iii. tab. 13. fig. Q. 10. 

 The four preceding species were found on the coast 

 of Pembrokeshire by Mr Adams. 



Genus XI. Murex. 



Shell spiral, rough, rvith membranaceous folds; mouth XI. Me- 



REX. 



Minimum, 



Terrestre, 



ObtusH- 

 lum, 



Breve, 



Minuturn^ 

 Lave, 



Obtusissi- 



mum. 





