In general every effort has been made to replicate the original text as faithfully as possible, including some instances of non-standard spelling and punctuation. Certain animal names (notably, "Lobster", "Crab") have occasionally been changed from lowercase to capitalized when the pattern of capitalization used by the author has permitted the transcriber to judge that the omission of such capitalization was likely to be typographical in nature and not intentional. The hyphenation is occasionally variable; this has not been altered. A few obvious punctuation errors have been corrected, as well as the following apparently typographical errors:
p. ix (List of Illus.) "8. Diastylis goodsiri...," 8 changed to [18]
p. xiv (List of Illus.) Plate II page reference, changed from 63 to [36]
p. xv (List of Illus.) Plate XXI caption, Palamon changed to [Palæmon]
p. xvi (List of Illus.) Plate XXVII caption, "The Coco Nut Crab, Birgus latro," Coco Nut changed to [Coconut]
p. 78 Fig 31 caption, "The adult of an allied species is figured on Plate XXV," XXV changed to [XXIII]
p. 165 "Daphnia pulex and other speces," speces changed to [species]
p. 169 "the addomen, however, is drawn out," addomen changed to [abdomen]
p. 196 Plate XXVII caption, "The Coco-nut crab, Birgus latro," Coco-nut changed to [Coconut]
p. 208 Plate labeled as XXVII (Group of Barnacles...) changed to [XXVIII]