CATALOGUE OF ANOMIADi;. 
Family ANOMIAD^. 
Anomiadas, Gray, Syn. B. M. 1840, 1842, 82, 92 ; P. Z. S. 1848, 
1849, 1 13. 
Anomiea, part, Hermannsen, Ind. Gen. i. 61, 1846. 
Anomia, sp., Linn. S. N. xii. 1150, &c., not Fab. Colonna, 1616. 
Anomia, Muller, Zool. Dan. Prod. 31, 1776; Lamk. Syst. 137, 
1801. 
Ostvea, part Ferussac, Tahl. Syst. 1819. 
Ostreadae, part Fleming, Brit. Anim. 381, 394, 1828. 
Ecbion and Echionodenna, Poli, Test. Sicil.i. 34, 1791, ii. 225, 
1795. 
? Bursula, sp., Klein, Ost. 173, 1753. 
Stola, part Klein, Ost. 173, 1753. 
Cepa, Humph. Mus. Calonn. 1797. 
Fenestella, Bolten, Mus. 1798, 2 ed. 134, 1819. 
Anoinya, Agassiz. 
The European species of Anomiadm have been much multiplied, 
while on the other hand the exotic species have been almost en- 
tirely neglected. 
The form, substance, surface and colour of the shell, which have 
been used to distinguish the species, were suspected by Montague 
to he dependent on the age of the specimens and the locality in 
which they happened to be found, and further researches have 
proved the accuracy of these observations. 
Synopsis of the Genera. 
1. Placunanomia. Shell not eared ; upper valve with two subcen- 
tral muscular scars ; the anterior upper lobe of the notch agglu- 
tinated to the cardinal edge ; plug shelly at the top and near 
the body, to which it is attached, and with homy longitudinal 
laminee below and internally. 
