38 GASTEROPODA. BULLAD. 
Amygdala marina, Plane. de Conch. minus notis, 22. t. 11. 
figs. E-I. 
Bulleea Planciana, Lamarck, Syst. des An. sans Vert. 63. 
Bulla, the Bubble, Da Costa, Brit. Conch. 30. t. 2. fig. 3. 
Habitat in littoribus arenosis vulgaris. 
Shell whitish and shining, somewhat round, slightly striated 
transversely. Length nearly an inch. 
Bullea Planciana is found on most of our sandy shores in 
considerable abundance, and is often thrown up alive. The 
colour of the animal is whitish, pellucid, sometimes speckled 
with pale brown, or blackish. That part which covers the shell 
is often streaked with opaque white. Length rarely more than 
an inch and a half. 
All our writers have confounded the shell with the Bulla 
aperta of Linné, which inhabits the African coast, and is totally 
different from this species. 
2. BuLLAZA CATENA. 
B. testa elongata, externé transversim striata; strius elevato- 
punctatis, hine catenam zmulantibus, apertura posticé acu- 
minata. 
Bulla Catena, Mont. Test. Brit. 215. t. 7. fig. 7; M. and R. 
Trans. Linn. Soc. viii. 122; Turt. Conch. Dict. 24. 
Habitat in Danmoniz, Hibernize et Cambrize Australis littori- 
bus, necnon in Freto Forth dicto, haud infrequens. 
Shell elongate, transversely striated externally; the striz 
with ovate elevated points, which give to the striz the appear- 
ance of chains, the aperture acuminated behind. Colour white. 
Surface glossy. Length a quarter of an inch. 
This elegant species, which has not yet occurred with its 
animal, inhabits the sandy shores of Devon, Cornwall, and 
South Wales. I observed it likewise in the Frith of Forth, and 
on every part of the southern coast of Ireland. 
From Montagu’s description, it is probable that his supposed 
variety, which I have never seen, may prove to be another 
species of this, or of some other genus of the family. 
