156, 



9. 



158, 



1. 



158, 



40. 



159, 



15. 



160, 



13. 



160, 



21. 



160, 



36. 



161, 



5. 



161, 



29. 



162, 



11. 



163, 



40. 



164, 



4. 



165, 



1. 



165, 



4. 



165, 



5. 



XVll 



Crepicephalus. Owen's figure, pi. 1 a, fig. 10 should be considered 

 the type species ; a true PtychopaiHa. Walcott uses an old gen- 

 eric name for a new genus ; with Dikelocephalus (?) iowensis^ 

 Owen, pi. 1 a, fig. 13, for its type. (A. W. V.) 



For Falls of the Ohio, read Crawfordsville, Ind. 



Erase "near Bloomsburg" tfec. to . 



Read Darran's Narrows. (E. W. C.) 



Read Spiinfera disjuncta. 



Read Orthoceras, 



Erase IX^ X. (J. J. S.) 



For Black read Green. (J. J. S.) 



Read Robinson. 



Read siphuncle. 



Read Proetus. 



For Lower Siluriayi, II, read Upper Cambrian, U. C, associated 

 with Dicellocephalus, &c., &c. See Bull. 30, U. S. G. S. p. 21, 26. 

 (O. D. W.) 



Read Terebratula, 



Read Ctenoptyeliius Steven soni. Worth en. — Read fish tooth. (J. 

 S. N.) 



Read Cuculoea. 



Read Cuneomya. 



165, 10. For Cyathaxonia lierzeri, read Cyathaxonia wisconsineiisis, 

 Whitfield, Geol. Wise. Vol. 4, 1882, pi. 14, f. 3— 5 ;— Prelim. Des. 

 Ann. Rt. Wise. Geol. Sur. 1878, p. 79. (R. P. W.) 

 165, 20. Read unita. 



165, 21. For Cyatliocrinus Hall, read Lecanocrinus macrope- 



talus. Hall, Pal. N. Y. Vol. 2, pi. 45, f. 1, &Q. fig. 5, 5a, 5b. (R. P. 

 W. ; J. C.) — The lower figure however is distinct from the others, 

 and of an undescribed genus. (R. P. W.) — Difierent genera. 

 (J. H.) 

 168, 4. Read Cyathophyllum. 



168, 19. For New York, read Chicago. 



169, 17. Read giganteuni. 



169, 23. Read Cyathophyllum. 



170, 1. Does not seem to be a Cyathophyllum. (G. F. M.) 



171, after 37. Insert Cychrus minor, Horn, and Cychrus wheatleyi, Horn, 



Trans. Amer. Ento. Soc. Vol. -, p. 242, 243. Found in the bone 

 cave at Port Kennedy, Chester Co., Pa. 



172, 18. Read leavenivorthanum. 



174, 1. For Cyclopteris, read Archseopteris jacksoni. See Daw^son's 

 Geol. Hist, of plants, p. 74, f. 24. CR. D. L. and J. W. D.) 



174, 2. For St. John, read Maine. (G. F. M.) 



174, after 4. Insert Cyclopteris obtusa, put by Dawson under Aneimites. 

 See Report on Fossil Plants of Lower Carboniferous and Mill- 

 stone grit 1873, p. 27. (R. D. L.) 



174, 5. For Cyclopteris valida, read Aneimiites valida. Dawson. (R. 

 D. L.) 



174, 6. Head per vetusttim. 



174, after 8. Insert Cymindis aurora, Horn, Trans. Am. Ent. Soc. Vol. — , p. 



243, insect found in Bone cave at Port Kennedy, Chester Co., Pa. 



175, 15. Read ohlongus. 



3 



