Zoological Society. 



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Family 11. Trigonacea. 

 Trigonia. 



Family 12. Naiades. 

 Unio. Iridina. 



Hyria. Mycetopus. 



Anodon. 



Family 13. Chamacea. 

 Etheria. Chama. 



Order 2. 

 Family 

 Tridacna. 



Family 

 Lithodomus. 

 Modipla. 



Family 

 Crenatula. 

 Perna. 

 Malleus. 



Family 

 Pedum. 

 Lima. 

 Pecten. 



Unimusculosa. 

 1. Tridacnacea. 

 Hippopus. 



2. Mytilacea. 

 Mytilus. 

 Pinna. 



3. Aviculacea. 

 Vulsella. 

 Avicula. 



4. 



Pectinacea. 



Plicatula. 



Spondylus. 



Family 5. Ostracea. 



Ostrsea. Placunanomia. 



Placuna. Anomia. 



Class 2. BRACHIOPODA. 



Family 1. Tendinosa, 

 Lingula. Terebratula. 



Family 2. Adhcerentia. 

 Thecidium. Orbicula. 



Crania. 



Class 3. GASTEROPODA. 



Order 1. Cirrhobranchiata. 

 Dentalium. 



Order 2. Cyclobranchiata. 



Chiton. Patella. 



Chitonellus. 



Order 3. Cervicobranchiata. 



Family 1. Fissuracea. 

 Lottia. Emarginula. 



Siphonaria. Fissurella. 



Parmophorus. 



Family 2. Capulacea. 

 Crepidula. Hipponyx. 



Calyptraea. Pileopsis. 



Family 3. Macrostomata. 

 Velutina. Stomatia. 



Sigaretus. Haliotis. 



Family 4. Tubispiracea. 

 Siliquaria. Vermetus. 



Order 4. PLEUROBRAJfCHIATA. 



Family 1. Bullacea. 

 Bulla. 



Family 2. Semiphyllidiana. 

 Pleurobranchus. Umbrella. 



Family 3. Aplysiana. 

 Aplysia. DolabeUa. 



Orders. Nucleobranchiata. 

 Carinaria. 



