40 ANOMIAD Ai. 
ANOMIA, Linneus. 
A. EPHIPPIUM, Linneus. 
A. ephippium, Brit. Moll. ii. p. 325, pl. 55. f.2,3,5,7; and animal, 
pl. Tf. 2. 
Anomia ephippium, A. electrica, A. cepa, A. squamula, A. aculeata, 
A, striolata, A. punctata, A. cylindrica, A. tubularis, A. striata, 
A. fornicata, A. coronata, A. patelliformis, A. undulata, Aucto- 
rum. 
A. aculeata, Brit. Moll. u. p. 332, pl. 55. f. 4. 
A. patelliformis, Brit. Moll. ii. p. 334, pl. 56. f. 5, 6. 
A. striata, Brit. Moll. 11. p. 336, pl. 55. f. 1, 6, and pl. 53. f. 6. 
Animal subdepressed, with its periphery suborbicular ; 
mantle circular, the upper portion, or the one forming the 
convex valve, of very thin and pellucid texture, except at the 
anterior margin, which is thick; and the under part, or that 
lying on the flat valve, is also thin, but has the appearance of 
being fleshy from having the ovarium soldered to it; both are 
clothed with a double fringe, which diminishes in breadth as 
it approaches the beaks, and passes round the aperture of the 
operculum, there throwing out cilia, and then is fixed under 
them. The outer circle of frmge consists of long, yellowish 
white, sharp-pomted tentacular filaments, which are, when 
undisturbed, continually protruded beyond the shell, and on 
the mner circle there are long and short cilia of the same 
colour distributed irregularly ; but the colours of the frmges 
and their marginal areas vary from a mixed blotchy red to 
yellow or purplish brown. No ocelli can be detected. There 
are a pair of circular branchize varying from pale red to dark 
brown on each side of the body, with fine longitudimal and 
transverse vessels, presenting the appearance of a delicate net- 
work; the plates of each pair have a part of their outer sur- 
faces double, and form circular open pouches, the upper part 
of which is well defined by the branchial vem : thus each single 
plate presents the aspect of two, and the two pair of branchize 
appear composed of eight plates; but the double parts can 
easily be placed in length, by the imsertion of a camel’s-hair 
brush in the hollows, and again be returned to the double 
