P. pectinata.
P. saccata.
P. varicosa.
P. dolabrata.
P. ingens.
P. vexillum.
P. nigrina.
P. squamosa. The scaly Pinna.
Species very close and rounded at the posterior extremity; valves convex, covered with vaulted imbricated scales.
P. flabellum. The fan Pinna. Pl. [13], fig. 2.