[{145}] Written between the lines occurs:—“extend to birds and other classes.”
[{146}] Written between the lines occurs:—“many bones merely represented.”
[{147}] In the Origin, Ed. i. p. 434, vi. p. 595, the term morphology is taken as including unity of type. The paddle of the porpoise and the wing of the bat are there used as instances of morphological resemblance.
[{148}] The sentence is difficult to decipher.
[{149}] In the Origin, Ed. i. p. 436, vi. p. 598, the author speaks of the “general pattern” being obscured in the paddles of “extinct gigantic sea-lizards.”
[{150}] See Origin, Ed. i. p. 437, vi. p. 599.
[{151}] The following passage seems to have been meant to precede the sentence beginning “These facts”:—“It is evident, that when in each individual species, organs are metamorph. a unity of type extends.”
[{152}] This is, I believe, the first place in which the author uses the words “theory of descent.”
[{153}] The sentence should probably run, “Let us take the case of the vertebrata: if we assume them to be descended from one parent, then by this theory they have been altered &c.”
[{154}] That is “we should call it a morphological fact.”