192 AUEICULIM:. 



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 C. denticulata high up the Thames, I have 

 been induced to insert them. 



a. Pillar 3- or 5-plaited ; mouth toothed ; peristome 

 slightly reflexed. (Ovatella Bivona.) Paludi- 

 nal, or marine. 



88. 1. CONOVULUS denticulatus. Denticulated Co- 

 novulus. 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. Ear. 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 Drop.) Alexia personata. Adams, 

 P. f. 5. 1854. Acteon deuticulutus. Fleming, B. A. 337. 



