I 
ERRATA. 
Page 22, 10th line, for “particular”, read “partial”. 
28, 4th line, for “they rest”, read “it rests”. 
36, 5th line from the bottom, for “ Illeneus ”, read “ Illsnus ”. 
61, 4th line from the top, tenth word, for “observed”, read “obscured”. 
94, 7th line from the top, for “is”, read “as”. 
104, 11th line from the bottom, “for none have been removed”, read “no gypsum being at that time uncovered or 
exposed ”. 
113, 2d line, for “ their precise range ”, read “ its precise range”. 
139, woodcut 33, the section of the bone is marked No. 6, instead of the shell between the bone and the Priscan 
ati'ypa. 
148, for “Paley B. Babcock”, read “ Peleg B. Babcock”. 
157, 3d line, for “Gryphseus”, read “Cryphaeus”. This error was corrected in some of the sheets. 
189, 4th line, substitute “but”, for “better”. 
197, 5th line from the bottom, for “Salina”, read “ Salmon river ”. 
210, 7th line, insert “other” after “several”. 
254, 2lst line, for “ these fossils ” read “those”. 
295, 10th line, a period after “each other”; then read, “ At Port Crane, far”, etc. 
