178, 



6. 



178, 



7. 



178, 



12. 



178, 



29. 



]78, 



39. 



178, 



40. 



179, 



1. 



XVlll 



175, 24. Keact Sanguinolites plicatus. 

 175,25. Read subelliptica. 



175, 27. Read siihellvpticus. 



176, 6. First of the two figures upside down. (J. H. ) 

 176, 25, 26. Erase 29 ; 65. (E. W. C.) 



176, 28. Credit figures and descriptions to Bull. American Museum, in 



Central Park, New York. (R. P. W.) 



177, 9. Cypr. iiiflata does not occur at Water town, N. Y., but is a Wiscon- 



sin species. Emmons' figure here given is probably of some 

 Modiolopsis. (R. P. W.) 



Read angustatiis. 



Read catskillensis. Also on line 9. 



Compare this figure with Palcnanatina typa^ Hall, 1870, Prel. Not. 

 Lam. VIII g. (J. II.) 



For Cyp. reciirvus, read Cimltaria recurva. (R. P. W.) 



For act read fact. 



Read Orbicula. 



For Cyp. rtionibeus, read Cytherodon. rhombeum, Hall, Pal. N. 

 Y. Vol. 5, pi. 75, f. 19-23. (R. P. W.) 

 179, 18. For better figures than those here given see Geology of Tennessee, 

 Plate 2. (J. M.S.) 



Read trancattts. 



Erase 9. — Line 33, erase 3, and 25. — Line 35, erase 46, 47, 48, 53. — 

 Line 36, erase 20, 5, 29, 48. — Line 37, 38, erase "Rambo's, Hamil- 

 ton jSK (107-1.) " (E. W. C.) 



Read expansum. 



Read treiitoiieiiwis. — This figure is an Oncoceras. (R. P. W. ) 



This figure is a Gyroceras. (R. P. W. ) 



For X read XL (J. J. S.) 



Read Schoharie. 



Read {CyrtonelLa). ( J. H.) 



For Melier, read Miller. 



Read aiiiericaiium. 



Read Hainie. 



For "bases of crinoidal columns, or stone lily stems" Matthew 

 queries if they be not tubes of Aulopora. Claypole says Aulo- 

 pora. A. Winchell also. Whitfield, buds of Aulopora, J. F. 

 James, branches or cells of the Polyzoans, probably a species ot 

 Aulopora. Collett suggests Tentaculites. 

 187, after 18. Insert Cytlierodoii rliombeiini, wrongly named Cypricardi- 



tes r ho nib ens on page 179 above. (R. P, W.) 

 187, next line. Insert Dadoxylon, a kind of wood. (J. W. D.) 

 187, 21. Read (Odoutoeliile. ) For a^geria, read egeria. (E. W. C.) 

 187, 27. Read Ibooilii. 



French authors are using Cryph(Eus for such species as Dalmanites 

 boothi, Grreen. But Green's generic name Cryphmus is objection- 

 able because used for another genus in Natural History. (A. 

 W. V.) 

 187, 33. To the figures here add the figure on page 111 above given to Caly- 



mene ? 



mauites callitiles is a synonym of Dalmanites boothi. (R. 

 P. W.^ 



180, 



1. 



180, 



32. 



181, 



5. 



181, 



19. 



181, 



26. 



182, 



3. 



182, 



24. 



183, 



1. 



183, 



10. 



183, 



31. 



183, 



36. 



184, 



26. 



