426 MOLLUSCA SUB-KINGDOM VI 



é : L 
Fainilies. = = = = . 5 = s 
| ie S — a ahes & = = 
OP Nee lecon ees ey |. | o>, | et aes 
Order 1. Prionodesmacea 
I. PALAROCONCHA 
1. Solemyacidae . ; ee ee eS ee eS SSS Eee 
2. Solenopsidae . 2 —— ee 
3. Vlastidae : 5 i 
~ +s | 
4. Grammysiidae : aa 
5. Cardiolidae . : — | 
6. Antipleuridae ; — | 
7. Praecardiidae . : — | 
XY | | 
Il. TAXoDONTA | | 
Superfamily 1. Vuculacea | 
8. Ctenodontidae L = | 
9. Nuculidae : : ——— | 
10. Ledidae . . F 
Superfamily 2. Arcaceu | 
11. Parallelodontidae . ———— | fe fe a | 
12. Cyrtodontidae : Se 
15. Limopsidae 
14. Arcidae . 
III. Scuizoponta 
Superfamily 3. Pteriaceu 


15. Pterineidae . i a | | 
16. Lunulicardiidae . | — 
17. Ambonychiidae — —— | | | 
18. Pinnidae ; : | ge eee tat i ie — — 
19. Conocardiidae \ —— | 
20. Pernidae : . ee |e eee ee ee 
21. Pteriidae e : Ingen poe —_—— SSS | ee rs 
22. Myalinidae . : — = 
23. Vulsellidae . ; | | —_ —— — 
Superfamily 4. Ostracea 
24. Ostreidae 
25. Kligmidae 
Superfamily 5. Naiadaceu 
26. Cardiniidae . \ —SS EEE 

27. Megalodontidae 
28. Unionidae 
29. Mutelidae 
30. Etheriidae 

Superfamily 6. 7'rigoniacea 
31. Lyrodesmidae 

32. Trigoniidae E A 
