ERRATA ANT) ADDENDA. 
Page 2, 8th line, for “ seventy” read twenty. 
Page 3, 1st line, for “southward” read south. 
Page 14, 2d line under the woodcut, insert after inclination, “ except at one point.” 
Page 14, 12th line from bottom, for “ 15°” read 60°. 
Page 14, 11th line from bottom, instead of “These are all slight inclinations” read With one exception ihef ore oil slight 
inclinations. 
Page 16, 6th line from bottom, for “ siliceous” read silicious. 
Page 17, 3d line from bottom, for “siliceous” read silicious. 
Page 23, 9th line, for “Zahara” read Sahara. 
Page 37, 17th line, for “ Irsocardia” read Isocardia. 
Page 42, 18th line, for “mountains” read mountain. 
Page 47, 7th line from bottom, for “since” read west of. 
Page 49, 9 th line from bottom, for “across” read through. After “ but” insert the Km of the survey. 
Page 57, 20th line from bottom, for “ stata” read strata. 
Page 60, 6th line from bottom, for “ its” read their. 
Page 65, 6th line from bottom, for “Estucado” read Estacado. 
Page 66, 18th line, after “commencing” insert at. 
Page 67, 10th line. Owing to an error in the copy of the translation of the notes, an inclination of 60 degrees recorded 
by Mr. Marcou (August 9, p. 127) was overlooked. 
Page 70, 26th line, for “ gandstones” read sandstones. 
Page 70, last line, insert “ calcareous.” 
Page 71, 25th line from bottom, insert a comma after “line” and after “above.” 
Page 75, 9th line from bottom, for “get” read yet. 
Page 76, 15th line from the bottom of the note, for “ coneliylieu” read conchylien. 
Page 78, 5tli line from the bottom, for “ R. J. Murchison” read II. 1 Murchison. 
Page 79, 9th line, for “Piteherii” read Piteheri. 
Page 100. It should have been stated in connexion with the reference to the figures of Grypha; Piteheri, that they wen- 
copied from the figures published by Mr. Marcou. 
Page 117, Nos. 7 and 8, for “rochenses” read rocheuses. 
Page 118, No. 60, for “Lano” read Llano 
Pag<ft.l8, No. 62, for “Colorada” read Colorado. 
Page 118, No. 66, for “ variagated” read variegated. 
Page 127, 3d line from bottom of translation, for “pebbles of carboniferous silex'’ real pebbles of silex, carboniferous. 
Page 127, 11th line of translation, for “fifteen” read sixty. 
Page 129, 4th line from bottom of original, for “ ros tre” read rose ties. 
Page 131, 23d line from bottom of translation, for “Nescomien” read Neoconuan; also in 4th line from bottom. 
Page 135, 25th line, for ‘‘plateaus” read plateau. 
Page 136, lltli line of translation, for “ Turritellas” read TurriteUce. 
Page 137, lltli line of translation, and line 14 and afterwards, for “ cretaceous” read Cretaceous. 
Page 138, 7th line from bottom of original and translation, and also in the foot-note, for “ Marchii” read Marshii. 
Page 139, in the foot-note, for “arcou” read Marcou. 
Page 142, 18th line of translation, for “ lumaclielle” read lumachel. 
Page 146, 4th line from bottom of translation, for “ stonestone” read sandstone. 
Page 150, 8th line of original, for “ Plateaux” read plateaux. 
Page 150, 8th line of translation, for “plateaus” read plateaux. 
Page 152, 17th line from bottom of translation, for “ semi-recticulatus” read semi-reliculatus. 
Page 153, 3d line from bottom of translation, for “Encampment” read Encamped. 
Page 154, 8th line from bottom of translation, for “ reticulatis” read reticulalus. 
Page 154, 25tli line translation, for “on” read or. 
Page 157, 25th line translation, for “Tertiaries inclining” read Tertiary , inclining. 
Page 160, 2d line from bottom of original, for “ protogene” read protogine. 
Page 160, 2d line from bottom of translation, for “quartzose, protogine, and very fine” read and quartzosc, protogine. 
very fine. 
Page 164, last line, for “quartenarv” read quaternary. 
2 Gr 
