Scurria, with pallial branchiae in a circle beneath the mantle.
In all the members of this family, as in the last, the pallial line of the shell is simple.
Frequently a depression in the pallial line toward the center of the valve is seen in the posterior end.
pallial sinus: A notch or recess of the pallial line; the scar of the siphon.
Cl, Cloacal or pallial chamber of Neomeniae and Chaetoderma.
Lucina has a curious tongue-shaped doubling of the pallial impression.
No ctenidia but pallial branchiae in a circle between mantle and foot.
pallial line: The impression or mark made by the mantle, or pallium, on the inner surface of a bivalve shell.
Foot without parapodia; no pallial cavity, but always a single ctenidium situated on the right side between mantle and foot.
The posterior end of the shell is contracted and slightly bent; the pallial sinus is deep.
pallial pal·li·al (pāl'ē-əl)
Of or relating to the cerebral cortex.