Note 60 — Chapter XIII · INHERITANCE continued—REVERSION OF ATAVISM.
Reading edition
See Steenstrup on the ‘Obliquity of Flounders’: in ‘Annals and Mag. of Nat. Hist.’ May, 1865, p. 361. I have given an abstract of Malm’s explanation of this wonderful phenomenon in the ‘Origin of Species’ 6th Edit. p. 186.