BULLA. li 
B. apLustrRE. Roundish ovate, white, with 
two flesh-coloured, bordered zones ; pillar some- 
what twisted ; spire elevated and retuse. #. W. 
18. 26. 
B. nypatTis. QOvate-rounded, thin, pellucid, 
and slightly striated longitudinally, yellowish 
horn-colour. {$3 in shape resembling somewhat 
B.naucum. B. W. 18. 17. 
B.naucum. White, rounded, pellucid, finely 
striated transversely, and umbilicated at both 
pede. es-) W. 18) 12: 
B. souipa. Cylindrical, white, umbilicated 
at the apex, and striated at the two extremities ; 
aperture extending the whole length of the shell. 
ze WV. 18. 56. 
B. austTRALis. Elongated, nearly cylindri- 
cal, mottled; spire very slightly perforated; in 
colour greatly resembling B. ampulla. 14. 
