192 
AUEICULID^. 
They live in brackish water and salt-water marshes^ 
at the roots of rushes, and are sometimes found under 
stones on the sea-shore near the mouths of rivers. 
Mr. Lowe {Zool. Journ, iv. 280.) at one time 
thought that the animal might be ptenobranchous ; 
but he has since seen reason to doubt this conclusion ; 
and the question has been settled by Mr. Berkeley’s 
admirable observations and figures of the animal. 
{ZooL Journ. v. 429. t. 19. f. 3.) 
On account of the marine or semimarine habit of 
most of the species of this genus, they were not 
noticed by Dr. Turton in the first edition of this 
Manual ; but as they are the only British Pneumono- 
branchiata which inhabit such places, and as I have 
found (7. denticulata high up the Thames, I have 
been induced to insert them. 
a. Pillar 3- or 6-plaited ; mouth toothed ; peristome 
slightly rejlexed. (Ovatella Bivona^ Paludi- 
nal, or marine. 
88. 1. CONOYULUS deuticulatus. Denticulated Co- 
no vulus. — Shell oblong, brittle, smooth, brown 
or purplish ; spire conical, ciliated ; mouth ob- 
long, rather thickened; pillar three- or five- 
plaited. (p. 219. f. 4, 5.) (t. 12. f. 144.) 
Turbo bidentatus. Walker^ Test. Min. Rar. f. 50. and 53. — 
Voluta denticulata. Mont. Test. Brit. 234. t. 20. f. 5. ; 
Berkeley., Zool. Journ. v. t. 19. f. 3., animal. — Voluta 
ringens. Turton., Conch. Diet. 250.- — Voluta reflexa. Tur- 
ton, Conch. Diet. 250. — Auricula myosotis. Jeffreys., Linn, 
Trans, xvi. 368. (not Drap.^ ~ Alexia personata. Adams., 
P. f. 5. 1854. — Acteon denticulatus. Fleming., B. A. 337. 
