ERRATA 
Page 1 2. For Lingula waeri.yensis, read L. waverliensis. 
Page 14, For Chonetes tumidus, read C. tumida. 
Page 18. For L. wavelyensis, read L. waverliensis. 
Page 24. The figure referred to as Fig. 12, of Plate III, has been omitted 
from the plates. 
Page 29. For Allorisma consaguinatus, read A. consanguinata. 
Page 37. Under bibliography, for Macordon. I'ead Macrodon. 
Page 38. Under C. ovata, for Plate IV. Fig. 6. read Fig. 5. 
Page 43. et seq. The proper orthography is probably Pal^aneilo. 
Page 44. ForNucuLA houghtoni, Stev., read N houghtoni, Win. 
Page 45. For Flemingia stultus, read F. stulta. 
Page 54. FAr Phillipsia (Proetus) auriculatus, read Proetus (Phllip- 
siA?) AURICULATUS, and make the same change in case of P. praecursor. 
Page 54. For Phillipsia meramacensis, read P. meramecensis. 
Page 78. For Plate IV, read Plate XIV. 
Page 99. Correct the numbering of the paragraphs. 
Page 100. For Sliuzodus, read ScHizoDUS. 
Page loi, (16). Add, at end, 100 feet. 
Page 107. Six lines from bottom, for elike, read like. 
Page 118. Under Plate III. instead of Leiorhyncnus, read Leiorhynchus. 
