XXix. 
Pectinacea. 
Family Pectinide. 
Genus Pecten, Miiller. 
Family Limidae. 
Genus Lima, Brug. 
Limea, Brown. 
Mytilacea. 
Family Mytilide. 
Genus Mytilus, LZ. 
Modiola, Lam. 
Crenella, Brown. 
Modiolaria, Lovén. 
Family Aviculide. 
Genus Avicula, Klein. 
Pinna, L. 
Submytilacea. 
Family Dreissensiidz. 
Genus Dreissensia, P. Van Beneden. 
Family Unionide. 
Genus Unio, Phalipsson. 
Anodonta, Lam. 
Family Cyrenide. 
Genus Sphzerium, Scopoli. 
Pisidium, C. Pfeiffer. 
Family Kelliidz. 
Genus Kellia, Turton. 
Lasea, Leach. 
Lepton, Turton. 
Montacuta, Turton. 
