ERRATA. 



Part I. page 181, nine lines from bottom, and first two lines in p. 183,/or that 

 in consequence, &c., read nevertheless had retained two di- 

 stinct names for one natural system, he would thereby have 

 done disservice to geological science. 



— — 183, line 9 from bottom, /or synonymous read equivalent. 



— —212,-2 from bottom, /or 87 read 8. 



— — 340, 341, and 342,/orPL. VIII. rea(?PL. XVIII. 



— — 346, line 13 from top, dele sp. 



— — 375, — 2 from bottom, /or Llanberis read Nant Francon. 



Part IL page 18, line 14 from bottom, /or jet read iodine. 



Directions to the Binder. 



The Binder is directed to place opposite page 174, Part I. the loose slip relating 

 to the Cambridge Meeting, Brit. Assoc. ; and at page 181 the loose slip with 

 Errata. 



