114 



I. Anomia. 



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. Ai\on\m, Midler, 1776; Retzius, 1788; Lamk. 1801; Me- 

 gerle, 1811 ; Schum. 1817. 



Anomia, pars, Linn. S. N. 



Anomia, A. Schmnach. Essai, 1817- 



Echion and Echinoderma, sp. Poll, Mol. Sicil. 



Fenestrella, Bolt en, 1798. 



Lampades, pars, Gevers, 1787- 



" Enigma, Koch," according to the cabuiet 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 suhorhicular . Anomia. 



■\ European. 



1. Anomia ephippitjm. 



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. viii. 82. t. 76. 

 f. 692, 693 ; Mont. T. B. 1.55 ; Lamk. Syst. 138 ; Dillw. R. S. i. 286 ; 

 Poli, Test. ii. 186. t. 20. f. 9, 10; Lamk. Hist. vi. 226, ed. 2. vii, 

 273. n. 1. 



Anomia Tmiica Cepa, Bacosta, B. Conch. 165. t. 11. f. 3. 



Anomia cepa, Linn. S.N.\\5\; Chemn. viii. 85. t. 7&. f. 694, 695; 

 Billw. R. S. i. 287 ; Poli, Test. ii. 182. t. 30. f. 1-8 ; Lamk. H. v. 227, 

 ed. 2. vii. 274. n. 3. 



Anomia violacea, Brug. Enc. Meth. 71. 



Anomia plicata. Brooch. Conch. 665. t. 16. f. 9. 



Anomia scabrella, Philippi, Sicil. i. 92. ii. 65. t. 18. f. 1. 



Anomia polymorpha, Philippi, Sicil. i. 92. ii. 65. 



Anomia costata, Broccki, 463. t. 10. f. 9. 



Anomia sulcata, Poli, Test. Sicil. t. 30. f. 12 ; Brocch. t. 10. f. 2. 



Anomia radiata, Broccki, 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. 1 1 ; Philippi, Sicil. ii. 63. 



Anomia electrica, Linn. S. N. 1151 ; Chemn. Conch, viii. t. 7&. 

 f. 691 ; Lamk. Hist. vi. 227, ed. 2. vii. 274. n. 4. 



