Changes made
Footnotes have been moved to under the text to which they belong. Where necessary, page numbers in references to footnotes have been adjusted accordingly.
The book uses long dashes as ditto marks; several of these have been replaced with the dittoed text. Where necessary, the word Ibid. in references has been replaced with the actual title.
Minor obvious typographical and punctuation errors have been corrected silently.
The Errata have already been corrected in the text.
Fractions have been standardised m⁄n.
Page xxiv: N. B. moved from bottom of page xxiii to bottom of list.
Page xxvii: deau douce changed to d’eau douce.
Page 41: f A and G a changed to f A and g A.
Page 50: pour les mois changed to pour le mois.
Page 52: that it would changed to than it would.
Page 77: The stage, Fig. f g h i changed to The stage, Fig. 1, f g h i; the screw at a changed to the screw at a.
Page 81: Plate III. B, is the stage changed to Fig. 3 B, is the stage.
Page 85: that at C, Fig. 4 changed to that at C, Fig. 3.
Page 172: their divine original changed to their divine origin.
Page 216: the sphinx atropos squeaks changed to The sphinx atropos squeaks.
Page 361: friends, says the author, who are ... changed to friends,” says the author, “who are ....
Page 387: motion of the fluids are changed to motion of the fluids is.
Page 446: E. eliptica changed to E. elliptica.
Page 476: accuminatus changed to acuminatus.
Page 525: 340. changed to 240.
Page 560: Plate XXII. Fig. 66 changed to Plate XXVII. Fig. 66.
Page 703: page 187, note 623 changed to page 187 note, 623.
Page 704: muscle changed to mussel (Cancer pisum).
Index: the spelling of some entries has been standardised with that used in the body text.