ERRATA. 



[Monograph XLIX of the United States Geological Survey.] 



Page 11. Eighth line of text from bottom, for ''1871 E" read "4739." 



Page 11. Third line of text from bottom, after the word '•Type" insert "No. 5157, U. S. 



National Museum.' 1 

 Page 12. To list of genera and species add "31. T. sulcatus Marsh. Am. Jour. Sci., vol. 39, 



May, 1890, p. 122. Type No. 1276, U. S. National Museum." 

 Page 33. In legend of tig. 30, for "2116" read "1201." 

 Page 37. In legend of fig. 32, for "2065" read "2116." 

 Page 39. In legend of tig. 31, for "2065 " read "2116." 

 Page 57. Fig. 62, left pubis is not that of type. 



Page 65. Nos. 1, 2, and 3 of fig. 74 are of specimen No. 5793, U. S. National Museum. 

 Page 115. Eleventh line from top, for "1871 E" read "4739." 

 Page 170. Tenth line from top, for "1871 E" read "4739." 



Note: Concerning statements on pages 139 and 140 relative to the condition of skull and jaw 

 of specimen No. 4928, it should be said that no record has yet been found of the receipt at the 

 National Museum of the missing parts. They probably became separated from the other material 

 in packing and in their fragmental condition can not now be accurately identified. 



