XI 



92, 5. Beyrichia , in Bedford borough, Pa., T 2, p. 89 ; Tentaculite 



limestone^ VI. (J. J. S.) 

 92, 33. Billingsia saratogensis. C. D. Walcott refers to a note under 



table of contents of Bulletin 30, promising the substitution of 



another generic name ; adding that he hopes to complete his 



study of these forms in the spring of 1889. 



92, 40. Blattina. See Mylacris bretonensis. Blattina. See GeraWaf 



tina fascigera. Blattina. See Mylacris heeri. Blattina. See 

 Eltoblattina venusta. 



93, 8. For unsheathed, read sheathing. (E. W. C.) 



94, 12. Read Sauripteris taylori. "Not Bothriolepis, and not a Placo- 



dei^in, but a scaled Ganoid, allied to Holoptychius.^' (J. S. New- 

 berry. ) 



91, 18. For tubuculata, read tuherculata. 



94, 20. See discussion of Protozoa, versus Bryozoa, in the Illinois Report 

 (J. C). 



96, 26. It must have been a Bellerophon patulus, or some other one of 



the Hamilton or Chemung species, that Prof. White found. (R- 

 P. W.) G. F. M. also protests against so long a range of time. 



97, 2. For 1856 read 1855. 



97, 25. That is, in the Chazy limestone itself, lib. (R. P. W.) 



97, 28. Add, also in the Silurian of Nova Scotia. See Acadian Geology. 



97, 37. Credit this and all other Spergen Hill figures and descriptions to the 



publications of the American Museum, Central Park, New York, 

 and as lent to the Indiana Geological Survey. (R. P. W.) 



98, 6. For canliaculatus read canaliculata. (E. W. C.) 

 98, 25. For Brunschweig, read Braunschweig. 



98, 40. Insert Buthotrephis flexuosa. Peach Bottom roofing slate quarries, 



York county. Pa. jSee Appendix. 



99, 1. S. A. Miller means to change this to Bythotrephis in his next edition- 

 99, 8. Hall (Pal. N. Y. Vol. 2, p. 18) renames the Trenton species Butho- 

 trephis tenuis; leaving B. gracilis as exclusively a Clinton species. 

 (R. D. L.) 



101, 12. Compare the graphitic fucoids on the Peach Bottom slates, York 



county. Pa. (E. W. C.) See Appendix. 



102, next 4. Insert Bathotrephis tenuis. Hall, Pal. N. Y., Vol. 2, p. 18; a 



new name given to B. gracilis, to remove the Trenton form from 

 the Clinton form. 



102, J3. Buthus? carbonariits, Meek & Worthen. See Eoscorpius car- 

 bonari us. 



102, 19. For Cadodus read Cladodus ; and remove the whole four lines to 

 page 131, below. 



105, 38. Catamites suckowii has recently been reported by I. C. White from 

 the Tipton run coals, in Blair Co., Pa., hitherto considered coal 

 beds of the Bocono, No. X, formation. (MS. letter Feb. 27, 1889.) 



104, 4. E. W. C. would write it caumformis. 



105, 20. I. C. W. prefers XII to XI; i. e., places these shales in the con. 



glomerate. 



106, 18. Calamites are plentiful in the shale above the limestone, not in the 



limestone itself. (J. J. S.) 

 106, 36. For Calamostachys, read Annularia. (R. D. L.) 



