This species of tree is recognized by the excurrent veins in its leaves.
(I) Animal removed from its shell, a probe g passed into the sub-pallial chamber through the excurrent siphonal notch.
Probe passed into the superior division of the subpallial chamber through the excurrent siphonal notch, and issuing by the side of the foot into the inferior division of the sub-pallial chamber.
- Psammobia Florida, right side, showing expanded foot e, and g incurrent and g' excurrent siphons.
It is through this passage, or indirectly through the pores of the gill-plates, that the water introduced into the lower subpallial space must pass on its way to the excurrent siphonal notch.