BIVALVES. — PINNA. 



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PINNA.— ^S-ea Wing. 



Rudis — Rough. 

 Pectinata — Spiny. 

 Nobilis — Great. 

 *Muricata — Muricated. 

 Rotundata — Giant. 

 Squamosa — Scaly. 

 Carnea.-^Flesh-color'd. 

 Saccata — Satchel. 

 Digitiformis — White. 



Lobata — Lobed. 

 Vitrea — Brittle. 

 Incurva — Incurved. 

 Bicolor — Two-colored. 

 E xusta — Pear-shaped. 

 Vexillum — Banner. 

 Papyracea — Paper. 

 Sanguinea — Red. 

 BwWdi.idi-'Studded, 



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