These are common on all limestone rocks in the area. Night low tide on the city dock (-5 ft), on limstone riprap.
At the end of Dock H at the Woodley island marina, Humboldt Bay, with Mytilus, sponges, tunicates, eelgrass, etc.
Single shell found lodged under Hormosira
Highlands Intermediate CoastBlitz Tapuae
Often you can see vein like patterns through the outside of these shells. They are quite robust in the sense that they easily seem to stay whole.
Common Red Lamp Shell.
Second shot depicts both valves inside and out.
How about this striated species of Lamp shell, and no baby at 35mm, in fact huge [highlighted specimen], fossicked from Manawa-kapakapa [spelling ?] south end of D'Urville Is.
Does not appear to be same sp as the smoothe shelled Common Red Lamp Shell [Magasella sanguinea] but may be a variation on it. Both this, and the Common Red Lamp Shell were found same beach or Ohana Bay over peninsula in Current Basin. [Next posting]
The Rhynchonellata is a class of Lower Cambrian to Recent articulate brachiopods that combines orders from within the Rhynchonelliformea (Articulata revised) with well developed pedicle attachment. Shell forms vary from those with wide hinge lines to beaked forms with virtually no hinge line and from generally smooth to strongly plicate. Most all are biconvex. Lophophores vary and include both looped and spiraled forms. Although morphologically distinct, included orders to follow a consistent phylogenetic sequence.