CLASS I 



RANGE OF THE PELECYPODA 



507 



Families. 





o 



a 

 o 



X: 



u 



O 



Superfamily 11. Isocardiacca 



29. IsocarJiidae . 



30. Vesicomyaciidae 



D. Teleodonta 

 Superfamily 12. Veneracea 



31. Veneridae 



32. Petricolidae . 

 Superfamily 13. Tellinacea 



33. Tellinidae 

 84. Seiiielidae 



35. Psammobiidae 



36. Donacidae 

 Superfamily 14. Solenacca 



37. Solenidae 

 Superfamily 15. Mactracea 



38. Mactridae , . 



39. Cardiliidae . 



40. Mesodesmatidae 



E. A.STHENODONTA 



Superfamily 16. Myacea 



41. Myacidae 



42. Corbulidae 



43. Saxicavidae 



44. Gastrocliaenidae 



Superfamily 17. Adesmacca 



45. Pholadidae 

 4G. Tcredinidae . 



tf 



2. 



[The text for the preceding chapter on Pelecypods was revised for the first edition of this 

 work by Dr. William H. Dall, of the United States National Museum, and is here reproduced 

 with comparatively few changes proposed by himself and Dr. R. S. Bassler. — Editok.] 



