ADDENDA AND CORRIGENDA. 



Page 14. add to reference of A. laotds, plate 81, fig. 5. 



Page 30, for A. ehmgatus read A. celsus. 



Page 54, add to reference of L. pbiamus, plate 82, Eg 



Page 74, line 2, for LXXXI read LXXXII. 



Page S-. line 3, for P. crenulabus read C erenviatus. 



Page ill. line 23, for recticulata read nthnhdn. 



Page 157, line 11. for anterior read posterior. 



Page 167, for ,4. Bigsbyi read />. Bigsbyi. 



Page 220, line S. tor N. V. read Pa. 



Pages 186 and 238, lines 4 and 7. respectively, for Alleghany read Cattaraugus. 



The names Philipsburgh ami Bockville, are localities referred to in the earlier Geological Reports. 



from which many fossils we] btained. The former ( Philipsburgh) is now known as Belmont. Rockville 



was a settlement near the month of Rock creek on the Genesee, in (he township of during the 



struction of the Genesee Valley Canal. The name dues not now appear in the Gazetteer. 



