RANGE OF THE PELECYPODA 429 




| GB | 
| E 
Families. S = | & = g ® © = | + 
= = iS = =| ca od Ss © S 2 
e 72) + oO Ay ao = =) <3) G & 
) | oy 
Superfamily 10. Jsocardiacea | | | 
29. Isocardiidae | | peg oe a Cae 
30. Callocardiidae | | ee 
D. TELEODONTA | I] 
Superfamily 11. Veneracea } 
31. Veneridae . : | al Oh 
32. Petricolidae . : | Se 
Superfamily 12. Ze/inacea | | 
33. Tellinidae .. | OD pce alee 
34. Semelidae : , | fer Sa A 
35. Psammobiidae ; | | pie | | se |e | eee 
36. Donacidae . : | ae y eter | hMeen eae ee 
Superfamily 13. Solenacea | | | | 
37. Solenidae : : 2 las allege | 

Superfamily 14. Muactracea | \| | 
38. Mactridae : : | 









39. Cardiliidae | ——_— 
40. Mesodesmatidae . | | | ee) ee 
E. ASTHENODONTA | 
Superfamily 15. MWyacea | | | | 
41. Myacidae : ; | | | | | Ee PR ae 
42. Corbulidae | | eee ee dE A ee Ps 
43. Saxicavidae . 2 | Lids oe a 
44, Gastrochaenidae . | a | |e fe | | 
Superfamily 16. ddesmacea 
45. Pholadidae . : fea Pea so |e et el ee 
46. Teredinidae . A Pea ee |. each — Sa 
| | | 




[Grateful acknowledgments are due to Dr. W. H. Dall, of the United States National 
Museum, for having revised and in large part rewritten the preceding chapter on the Pelecypods. 
It is to be regretted, however, that limits of space necessitated a partial abbreviation of the 
original text, for which the Editor alone is responsible.—TRANS. ] 

