114 
I. Anomtia. 
Upper valves with three subcentral muscular scars; byssal notch 
distinct ; the upper part of the anterior lobe of the notch separate 
from and often partially overlapping the front of the cardinal edge ; 
the plug thick, elongate, entirely shelly, and quite free from the edge 
of the notch. 
Syn. Anomia, Miiller, 1776; Retzius, 1788; Lamk. 1801; Me- 
gerle, 1811; Schum. 1817. 
Anomia, pars, Linn. S. N. 
Anomia, A. Schumach. Essai, 1817. 
Echion and Echinoderma, sp. Poli, Mol. Sicil. 
Fenestrella, Bolten, 1798. 
Lampades, pars, Gevers, 1787. 
«« Enigma, Koch,” according to the cabinet of Mr. Cuming. 
I am by no means certain that all the species here indicated are 
distinct, or are to be distinguished by the characters here assigned to 
them, unassisted by the country which they inhabit ; but they seem 
distinct, and it appears to be desirable that they should be distin- 
guished until we have the means of more completely investigating 
them, and of examining and comparing the animals which form them. 
* The upper scar in dorsal valve large; two lower scars smaller, 
and nearly under the upper one. Shell suborbicular. ANomta. 
+ European. 
1. ANOMIA EPHIPPIUM. 
Shell white, yellow, rosy or red-brown ; upper valve radiated ; in- 
ternally pearly. The upper scar large, oblong, the two others rather 
smaller, subequal, one above the other; the lowest of the two rather 
more behind. Plug large, broad, short ; the sinus in lower valve large. 
Anomia Ephippium, Linn. S. N. 1150; Chemn. vin. 82. t. 76. 
f. 692, 693; Mont. T. B.155; Lamk. Syst. 138 ; Dillw. R. S.i. 286 ; 
Poli, Test. ti. 186. t. 20. f. 9, 10; Lamk. Hist. vi. 226, ed. 2. vii. 
273. n. 1. 
Anomia Tunica Cepa, Dacosta, B. Conch. 165. t. 11. f. 3. 
Anomia cepa, Linn. 8. N. 1151; Chema. viii. 85. t. 76. f. 694, 695; 
Dillw. R. 8.1. 287 ; Poli, Test. ii. 182. t. 30. f£.1-8 ; Lamk. H. v. 227, 
ed. 2. vii. 274. n. 3. A 
Anomia violacea, Brug. Enc. Meth. 71. 
Anomia plicata, Brocch. Conch. 665. t. 16. f. 9. 
Anomia scabrella, Philippi, Sicil. i. 92. ii. 65. t. 18. f. 1. 
Anomia polymorpha, Philippi, Sicil. i. 92. 0. 65. 
Anomia costata, Brocchi, 463. t. 10. f. 9. 
Anomia suleata, Poli, Test. Sicil. t. 30. f.12; Brocch. t. 10. f. 2. 
Anomia radiata, Brocchi, t. 10. f. 10. 
Anomia pectiniformis, Poli, Sicil. t. 30. f. 13, on a Pecten; Phi- 
lippi, Sicil. ii. 63. t. 18. f. 3. 
Anomia margaritacea, Poli, Sicil. t. 30. f.11; Philippi, Sicil. ii. 63. 
Anomia electrica, Linn. S. N. 1151; Chemn. Conch. viii. t. 76. 
f.691; Lamk. Hist. vi. 227, ed. 2. vii. 274. n. 4. 
