189, 



31. 



190, 



1. 



192, 



1. 



192, 



5. 



192, 



6. 



XIX 



388, 7 ; 8 ; 10. Erase 47 ; 14 ; 12, 13. (E. W. C.) 



188, 34. Read longicaudatus. 



189, 16. Read cheek. 



189, 21. Read myrinecophorus. 



189, 26. Clay pole and White In their Reports give their reasons for recog- 

 nizing no Upper Helderberg limestones in Middle Pennsylvania 

 Their reasons are wholly palseontological ; the fossils are all Ma7' 

 cellus forms. I do not accept this fact as a sufficient argument 

 for so important a conclusion as the cessation of sediments in the 

 Upper Helderberg age over an area showing no certain marks of 

 stratigraphical nonconformability. 

 Read pleuroptyx. (R. P. W.) 

 Read pleuroptyx. (R. P. W.) 



Insert Daiiacites, Goepp., and Declienia, Goepp. (L. L. ) 

 Read brachynota and bracliynota. 



The absurd spacing of the page above and below Delthyris com- 

 plicata was the result of the compositor's misunderstanding a 

 direction for spacing out the whole of a short page, given on the 

 last revise. 

 192, 11. Read stamiiiea. 



192, 22. For inedialis, read audacula, Conrad. (R. P. W.) 

 192, 25. Read mucronata. 

 192, 28. Read radiata. 

 192, 30. Read sinuata. 



192, 31. Read stainiiiea. 



193, 1. Read Deltox>tycliiiis. 

 193, 14. Read {erpeton.) 



193, 16. For Calami te tree, read iSigillaria. (J. W. D.) 



193,22. Read, "or a similar reptile." — Compare Mantell's Telerpeton elgi- 

 nense from the Old Red of Scotland. It is my personal opinion 

 that this part of the Old Red is really Lower Carboniferous and 

 not Devonian. The Telerpeton may however be even Triassic* 

 (A. Winchell.) 



194, 5. Itead Tatamagouche. 



195, 38. Read (manganesian or ferruginous.) 



196, ovei 38, insert Deataliam cericeum, Worthen, 111. Report, found in the 



Coal measures of Illinois and Indiana. (J. C.) 

 196, 21. For Clwphycus, read Gliloephycus. — Miller & Dyer never made a 

 genus Zygophycus. The genera AristophycuSy ChloephycuSj 

 Trichophycas, &c., were referred by J. F. James to inorganic 

 causes as early as 1884. See Fucoids of the Cincinnati Group, 

 Jour. Cin. Soc. Nat. Hist. Oct., 1884, Jan., 1885, Vol. 7. * (J. F. J.) 

 198, over \, insert Dicallas alutaceus, Horn, Trans. Am. Ent. Soc. Vol. 5, 

 p. 244, found in the Port Kennedy bone cave, Chester Co., Pa. 



198, 1. Read harti. 



199, 5. For 62, read 21. (G. F. M.) 

 199, 25. Read crassus. 



199, 26. Read Dicryospongia fenestrata. (G. F. M.) 



199, after 37, insert Dicto-cordaites, a genus, just established by Dawson. 

 Amer. Jour. Science, July, 1889, allied to Cordaites, with figure 

 and description of the specimen from Meshoppen, Wyoming Co., 

 Pa., in Lacoe's cabinet at Pittston, from Devonian strata. See 

 Appendix. 



