ERRATA. 



PAGE. 

 168 



LINE. 



5 



203 



205 

 209 



211 

 224 

 2-25 



229 



Plate 



Plate 



Plate 



Plate 



12 



4 

 6 



5 



4 

 19 



8 



4 



4 

 19 

 I. 



VIII. 

 X. 

 XIII. 



Plate XXV. 

 Plate XXVI. 



Plate XXXI. 

 Plate XXXII. 



Plate XXXIV. 



Between line 4 and 3 from bottom add ; Platyceras ven- 

 tricosum, Hall. 12th Kept. State Cab. Nat. Hist., p. 17, 

 1859. 



For petilla read petila. 



From bottom, add p. 5<>, 1879. 



Read p. 130. 



Read 1879. 



Add part 2, p. 23. 



From bottom for pi. 12, read p. 36. 



From bottom, add pi. 13, as var. Ohioensis. 



Read 1879. 



Read 1884. 



After Cliiiopistha add ; Proc. Phila. Acad. Nat. Sci., p. 43, 

 1870. 



From bottom, read pi. 11. 



Read pp. 171, 172. 



Read 1885. 



Place (?) after Cypricardinia in references. 



From bottom add ; & p. 95, fig. 18, 1885. 



From bottom, add 1872. 



Add 1885. 



Read 1884. 



Read 1884. 



From bottom, add pp. 1-4, and read 1884. 



Read 1884. 



Description, transpose figs. 7 and'9. 

 Description, for fig. 1 read fig. 1-5. 

 For 32 in lower left hand corner read 36. 

 Change 23 on second line of figures from lower left hand 



corner to 32. 



In description for fig. 6, last line, read fig. 10. 

 Add 13 to upper, and 14 to lower one of the two unnumbered 



figures. 



Read Murchisonia petila for M. petilln. 

 Fig. 12, read enlarged twice. 

 After Rhyn. knotti, read p. 56. 

 Under Rhyn. rugaecosta, read enlarged twice. 

 For Rhynchonella cuneata, etc., read Rhynchotreta. 

 For Rhyn. increbescens, read R. capax. 

 For Orthis flabellum, read O. flabellulum. 



