BIVALVES. — PINNA. 



67 



PINNA.— ^m Wing, 



Rudis — Rough. 

 Pectinata — Spiny. 

 Nobilis — Great. 

 *Muricata — Muricated. 

 Rotundata — Gian t. 

 Squamosa — Scaly. 

 Carnea — Flesh-color' d. 

 Saccata — Satchel. 

 Digitiformis — White. 



Lobata — Lobed. 

 Vitrea — Brittle. 

 Incurva — Incurved. 

 Bicolor — Two-colored. 

 Exusta — Pear-shaped. 

 Vexillum — Banner. 

 Papyracea — Paper. 

 Sanguinea — Red. 

 B\.}\\^td^— Studded. 



p2 



