BULL A. DIPPER. 19 



17. Buccinum breve. 



Linn. Trans, iii. pi. 13. f. 3, 4. 



Shell opake, white, with five spires, ribbed longKuii- 

 nally, and striate transversely : canal very short. 

 On the Pembrokeshire coast : minute. 



18. Buccinum minutum. 

 Linn. Trans, iii. pi. 13. f. 5, 6. 



Shell opake, white, with three spires ribbed longitudinally. 

 On the Pembrokeshire coast : minute. 



19. Buccinum Iseve. 



Linn. Trans, iii. pi. 13. f. 78. 



Shell opake, white, smooth, with three spires ; the first 

 more inflated than the next : aperture oval, with a long beak. 

 On the Pembrokeshire coast : minute. 



20. Buccinum obtusissimum. 

 Linn. Trans, iii. pi. 13. f. 9, 10. 



Shell opake,white, smooth, with three spires ; the first not 

 more tumid than the next : beak longitudinally contracted. 

 On the Pembrokeshire coast : minute. 



BULLA. DIPPER. 



Shell with a single convolute valve, without 

 teeth: aperture mostly contracted, reaching nearly 

 or the whole length of the shell, without a canal, 

 and entire at the base ; pillar-lip oblique, smooth. 



1. Bulla lignaria. Wood Dipper. 



Lister, pi. 714. f. 71 Pennant, pi. 73, middle fig. Da 

 Costa, pi. 1. f. 9 Donovan, pi. 27 Dorset Cat. pi. 23. f. 9. 



Shell oblong-oval, thin, brittle, semitransparent, yel- 

 lowish or chesnut brown, with numerous fine pale trans- 

 verse lines which run rather obliquely, and a few obscure 

 longitudinal ridges, sometimes with one or two white ob- 

 lique long tudinul bands ; inside white, glossy, with a very 

 thin outer margin : aperture wide, oval, narrowed towards 

 the crown which is slightly concave at top : pillar-lip 

 smooth, spreading on the body of the shell, white with 



01 1 C 11 



