anomiaDjE. 
17 
tremely variable in form, surface, colour and thickness, and they 
also offer considerable variety in the disposition of the muscular 
scar. In all the upper scar is largest, but variable in shape 
from round to broad cordate. In most the two lower scars are close 
together, but separate, and nearly on the same line. In others the 
lower scar is rather lower than the middle one, and in a few (four) 
specimens, which are mostly produced posteriorly, the lower scar is 
much lower ; that is to say, in some the upper edge is parallel with 
the lower edge of the middle one. In one specimen the two lower 
scars are on the same line, and are confluent together, forming a 
scar about the same size as the upper scar, yet showing that the 
lower scar is formed by two muscles ; so that this valve cannot be 
confounded with a Placunanomia. 
The examination of this series of specimens from the same loca- 
lity I think shows, that though the comparative size and disposition 
of the scars may furnish good characters for the distinction of the 
species, yet they are not to be relied on. 
6. AnOMIA BELESIS. 
White or red ; the upper jiart of the centre of the dorsal valve 
white, externally radiately striated ; apex acute, at some distance 
from the dorsal edge. Upper valve with three separate scars, the 
upper one very large, oblong, and ratber transverse ; two lower 
ones veiy small, nearly equal. sized, and nearly on the same line. 
Anomia belesis. Gray, P. Z, S. 1849, 116, Moll. t. 4, f. 3, 4. 
а. White, rather thick. Indian Ocean. Presented by Gene- 
ral Hardwicke. 
б, c. Red. Indian Ocean. Presented by General Hardwicke. 
Specimen figured P. Z. S. 1849, t. 4, f. 3, 4. 
-f-ff American. 
7. Anomia acontes. 
Yellowish white, suborbicular, flat, smooth ; disk pearly. Upper 
scar moderate, subcircular ; lower scars smaller, distant, circular, 
subequal, the lower one nearly on a line with the lower edge of 
the middle one. 
Anomia acontes. Gray, P. Z. S. 1849, 116. 
Ifab. Jamaica. One small specimen in Mr. Cuming’s collection. 
